LMC rear gas tank install - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jess66chevy · 07-18-2009, 09:32 PM

Has anyone done a LMC rear mounted gas tank? I bought it as a kit but there was no instructions. This is how it came out when I did it. Of course, there had to be alot of modification.
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Name: Pictures 079.jpg
Views: 58105
Size: 44.7 KB

70 Suburban · 07-18-2009, 10:20 PM

would be nice if you did a install tech kinda thing...

Apache63 · 07-19-2009, 07:13 AM

Here´s a few pic´s of my LMC Gas tank kit!

that´s my way to install the tank!!

Pat

70 Suburban · 07-19-2009, 10:08 AM

nice install. what did you have to do to get it in there

joe231 · 07-19-2009, 11:16 AM

that looks nice fellas!!!!

Apache63 · 07-19-2009, 12:20 PM

Quote:

Originally Posted by 70 Suburban

nice install. what did you have to do to get it in there

that´s really simple , put the tank under the frame , put the metal straps in place and bolt on the straps on the left side of the frame , on the right side of the frame drill two holes in the underside of the frame , drill upside two larger holes in the frame (see pic #2,it shows the passenger side with the two larger holes), put the bolt from the straps thru the frame on the right side and put the fasteners thru the frame on the bolts ! DONE!!!!!!

i hope you understand what i want to say!

Pat

apachedaddy · 07-19-2009, 07:13 PM

apache63 the tank looks great but your going to run into issues when you go to install the bed. The first cross sill in front of the rear will hit the tank and fill neck without a ton of mods. jessy66 in the first pic has the right idea with the flush top mount. Hope it all works out for you.

creep · 07-19-2009, 07:44 PM

Quote:

Originally Posted by jess66chevy

Has anyone done a LMC rear mounted gas tank? I bought it as a kit but there was no instructions. This is how it came out when I did it. Of course, there had to be alot of modification.
Attachment 479930

I don't know if that notch is a good idea. Seems like it would make the frame really weak.

**Captainfab** · 07-19-2009, 10:15 PM

IMO the way Apache63 did his is the best way to install them regardless of bed crossmember interference. That can be dealt with. I would rather have the tank as high as possible. Just my .02

jess66chevy · 07-19-2009, 10:20 PM

I had to cut the frame a little bit for the gas filler neck. The bed went on with no problems with the gas tank flush mounted.

joe231 · 07-19-2009, 11:45 PM

Quote:

Originally Posted by Captainfab

IMO the way Apache63 did his is the best way to install them regardless of bed crossmember interference. That can be dealt with. I would rather have the tank as high as possible. Just my .02

**Chevy Fleetside** · 07-20-2009, 10:22 AM

Mine is done like Apache63. Some pictures are here. http://s49.photobucket.com/albums/f2...ucks/?start=40

ol Curt · 07-20-2009, 10:49 AM

"that´s really simple , put the tank under the frame , put the metal straps in place and bolt on the straps on the left side of the frame , on the right side of the frame drill two holes in the underside of the frame , drill upside two larger holes in the frame (see pic #2,it shows the passenger side with the two larger holes), put the bolt from the straps thru the frame on the right side and put the fasteners thru the frame on the bolts ! DONE!!!!!!"

Huh?

I think I need to see a close up of the bolts/holes!

Fred T · 07-20-2009, 11:01 AM

You committed a major structural no-no with the way you cut the frame. I was looking at that last night, trying to come up with a solution that was feasible.

My first choice would be with a piece of round tube, say 4 or 6" diameter, welded to the inside of the frame. Something like the attached sketch.

apachedaddy · 07-20-2009, 12:15 PM

Quote:

Originally Posted by Captainfab

IMO the way Apache63 did his is the best way to install them regardless of bed crossmember interference. That can be dealt with. I would rather have the tank as high as possible. Just my .02

True statment about the hight, but if it was me i would rotate the tank 180 so the filler neck is not over the mounting hole for the cross sill. Then the only mod would be to notch the center part of the sill.

ol Curt · 07-20-2009, 12:29 PM

Wouldn't that make it exiting very near the wheel well on the passenger side?

joe231 · 07-20-2009, 12:46 PM

Quote:

Originally Posted by ol Curt

"that´s really simple , put the tank under the frame , put the metal straps in place and bolt on the straps on the left side of the frame , on the right side of the frame drill two holes in the underside of the frame , drill upside two larger holes in the frame (see pic #2,it shows the passenger side with the two larger holes), put the bolt from the straps thru the frame on the right side and put the fasteners thru the frame on the bolts ! DONE!!!!!!"

Huh?

I think I need to see a close up of the bolts/holes!

I believe what Pat is saying, correct me if I'm wrong Pat, on the first side you have access to tighten the strap bolts but once the tank is in the way he didn't have the access he needed to tighten the bolts so he drilled two larger holes in the top of the frame rail so he could get a socket and extension in there to tighten the bolts on the lower side of the frame that holds the straps in place.......follow?

Apache63 · 07-20-2009, 12:59 PM

Quote:

Originally Posted by joe231

I believe what Pat is saying, correct me if I'm wrong Pat, on the first side you have access to tighten the strap bolts but once the tank is in the way he didn't have the access he needed to tighten the bolts so he drilled two larger holes in the top of the frame rail so he could get a socket and extension in there to tighten the bolts on the lower side of the frame that holds the straps in place.......follow?

Yes , Joe you´re right !!
i´ll take this week some pic´s from the frame and tank!
the bed is already mounted and i fits perfekt !
but one cross sill i cut it into place to fit the gas filler neck!
pic´s can say more then 1000 of words!!

Pat

joe231 · 07-20-2009, 01:05 PM

cool!
can't wait

Apache63 · 07-20-2009, 01:09 PM

Quote:

Originally Posted by joe231

cool!
can't wait

i´m fast like a bullet!!!!

found some pic´s on my PC , i hope it helps!!!

Pat

joe231 · 07-20-2009, 01:15 PM

Pat, have you been holding out on us, or did I miss that you have a truck too?????

Apache63 · 07-20-2009, 01:30 PM

Quote:

Originally Posted by joe231

Pat, have you been holding out on us, or did I miss that you have a truck too?????

here take a look on my 63´ Longbed

http://67-72chevytrucks.com/vboard/s...107362&page=18

Pat

ol Curt · 07-20-2009, 01:39 PM

Quote:

Originally Posted by joe231

I believe what Pat is saying, correct me if I'm wrong Pat, on the first side you have access to tighten the strap bolts but once the tank is in the way he didn't have the access he needed to tighten the bolts so he drilled two larger holes in the top of the frame rail so he could get a socket and extension in there to tighten the bolts on the lower side of the frame that holds the straps in place.......follow?

Ok, I get it now. If you knew or had marked the spots for the bolts couldn't you just place the bolts in the hole with the threads down and weld the head of the bolt to the frame without having to put more holes in the top of the frame?

joe231 · 07-20-2009, 01:52 PM

Quote:

Originally Posted by Apache63

here take a look on my 63´ Longbed

http://67-72chevytrucks.com/vboard/s...107362&page=18

i remember now!!
nice truck!

Pat

Quote:

Originally Posted by ol Curt

Ok, I get it now. If you knew or had marked the spots for the bolts couldn't you just place the bolts in the hole with the threads down and weld the head of the bolt to the frame without having to put more holes in the top of the frame?

yeah, or even weld nuts on top of the lower lip of the frame.

Apache63 · 07-20-2009, 01:54 PM

Quote:

Originally Posted by ol Curt

Ok, I get it now. If you knew or had marked the spots for the bolts couldn't you just place the bolts in the hole with the threads down and weld the head of the bolt to the frame without having to put more holes in the top of the frame?

i think it is possible to weld the bolt´s to the frame !
but i don´t know if it is the best way !
so i only can say try try try which way is the best way for you!

Pat

07-18-2009, 09:32 PM	#1
jess66chevy Registered User Join Date: Jul 2009 Location: glendale, az Posts: 192	LMC rear gas tank install Has anyone done a LMC rear mounted gas tank? I bought it as a kit but there was no instructions. This is how it came out when I did it. Of course, there had to be alot of modification.

07-19-2009, 07:13 AM	#3
Apache63 1# Drobmember in Germany Join Date: Aug 2008 Location: Wuppertal , Germany Posts: 518	Re: LMC rear gas tank install Here´s a few pic´s of my LMC Gas tank kit! that´s my way to install the tank!! Pat

07-19-2009, 10:08 AM	#4
70 Suburban Rods Join Date: Nov 2002 Location: Bryan, TX Posts: 1,398	Re: LMC rear gas tank install nice install. what did you have to do to get it in there __________________ Just keepin it simple. 1965 C-10 Ext cab build. 350??(Does it count at 2 truck if I had to cut one up?) 1966 C-10 lwb 283 auto 1970 Suburban in pieces 1971 Blazer 4wd....restore someday. all factory CST 1972 Blazer 4wd parts truck still a roller 1972 GMC Sierra Grandee 1998 Chevy ext driver. 2005 F**D the wife drive...(cant fix women)

07-19-2009, 11:16 AM	#5
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: LMC rear gas tank install that looks nice fellas!!!! __________________ *CHEVY ONLY*

07-19-2009, 07:13 PM	#7
apachedaddy Registered User Join Date: Feb 2008 Location: pooler, GA Posts: 213	Re: LMC rear gas tank install apache63 the tank looks great but your going to run into issues when you go to install the bed. The first cross sill in front of the rear will hit the tank and fill neck without a ton of mods. jessy66 in the first pic has the right idea with the flush top mount. Hope it all works out for you.

07-18-2009, 10:20 PM	#2
70 Suburban Rods Join Date: Nov 2002 Location: Bryan, TX Posts: 1,398	Re: LMC rear gas tank install would be nice if you did a install tech kinda thing... __________________ Just keepin it simple. 1965 C-10 Ext cab build. 350??(Does it count at 2 truck if I had to cut one up?) 1966 C-10 lwb 283 auto 1970 Suburban in pieces 1971 Blazer 4wd....restore someday. all factory CST 1972 Blazer 4wd parts truck still a roller 1972 GMC Sierra Grandee 1998 Chevy ext driver. 2005 F**D the wife drive...(cant fix women)

07-19-2009, 10:15 PM	#9
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: LMC rear gas tank install IMO the way Apache63 did his is the best way to install them regardless of bed crossmember interference. That can be dealt with. I would rather have the tank as high as possible. Just my .02 __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

07-19-2009, 10:20 PM	#10
jess66chevy Registered User Join Date: Jul 2009 Location: glendale, az Posts: 192	Re: LMC rear gas tank install I had to cut the frame a little bit for the gas filler neck. The bed went on with no problems with the gas tank flush mounted.

07-20-2009, 10:22 AM	#12
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,782	Re: LMC rear gas tank install Mine is done like Apache63. Some pictures are here. http://s49.photobucket.com/albums/f2...ucks/?start=40 __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 Last edited by Chevy Fleetside; 07-20-2009 at 10:23 AM.

07-20-2009, 10:49 AM	#13
ol Curt Junior Member Join Date: Dec 2006 Location: Newburgh, IN Posts: 1,247	Re: LMC rear gas tank install "that´s really simple , put the tank under the frame , put the metal straps in place and bolt on the straps on the left side of the frame , on the right side of the frame drill two holes in the underside of the frame , drill upside two larger holes in the frame (see pic #2,it shows the passenger side with the two larger holes), put the bolt from the straps thru the frame on the right side and put the fasteners thru the frame on the bolts ! DONE!!!!!!" Huh? I think I need to see a close up of the bolts/holes! __________________ 1966 Chevy C10 Longbed I'm Bob....ol Curt was my Grandpa The truck was his and he sure as heck wouldn't understand why I took a perfectly good truck and tore it down! Last edited by ol Curt; 07-20-2009 at 10:50 AM.

07-20-2009, 11:01 AM	#14
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: LMC rear gas tank install You committed a major structural no-no with the way you cut the frame. I was looking at that last night, trying to come up with a solution that was feasible. My first choice would be with a piece of round tube, say 4 or 6" diameter, welded to the inside of the frame. Something like the attached sketch. Attached Images __________________ Fred There is no such thing as too much cam...just not enough engine.

07-20-2009, 12:29 PM	#16
ol Curt Junior Member Join Date: Dec 2006 Location: Newburgh, IN Posts: 1,247	Re: LMC rear gas tank install Wouldn't that make it exiting very near the wheel well on the passenger side? __________________ 1966 Chevy C10 Longbed I'm Bob....ol Curt was my Grandpa The truck was his and he sure as heck wouldn't understand why I took a perfectly good truck and tore it down!

07-20-2009, 01:05 PM	#19
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: LMC rear gas tank install cool! can't wait __________________ *CHEVY ONLY*

07-20-2009, 01:15 PM	#21
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: LMC rear gas tank install Pat, have you been holding out on us, or did I miss that you have a truck too????? __________________ *CHEVY ONLY* Last edited by joe231; 07-20-2009 at 01:15 PM.

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