gonna install a big motor and discs, help needed. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Pumkin Truck · 04-08-2002, 03:54 PM

Hey everyone, i recently picked up a front end from a 72 gmc with disc brakes. I also got the brake resiovor,if thats what you call it?(thing infront of the boosters) I think the swap should be fine. My questions are: the big motor is a 76 500cid cad with the 400 tranny. Anyone here ever installed one of these monsters in our trucks (my truck is a 69 gmc swb stepside with a wimpy six) from the looks of things i know that i am going to have to alter my driveshaft and fab motor mounts, do you think that the stock rad with electric fans or the fan from the cad will keep it cool and would i have to tear up my floor to fit the tranny in place? thanks for the much needed help. pumpkin truck.

imaindianoutlaw · 04-08-2002, 03:58 PM

Sounds like a good Idea to me!

------------------
Charles W. Hein
S. Williamsport PA

imaindianoutlaw@yahoo.com

REFRIGERATION TECH

1971 Rolling chassis

FOR SALE
1963 Pontiac Tempest
1965 Pontiac GTO
1956 Pontiac 2 dr

69 longhorn · 04-08-2002, 04:20 PM

I cant say on booster clearance,I did run a 425 cad in the longhorn for a while(manual brakes). You will need an eldorado pan & pick up,& watch the head clearance(#1 ,or the foward back is on the pass side on the Cad). The cad mounts are also foward ,as compaired to a chev,& there a couple different pump bottoms/filter adaptors. I didnt have to cut the crossmember with the 425 setup(for filter clearance). The stock manifolds for a sedan deville should fit ,Or some guys were using modiied BB chev headers,with a cad flange welded to them. You will love the dist clearance! Best to set it in, check clearance at the firewall,bubble level& go from there. Good luck....69

Pumkin Truck · 04-08-2002, 04:57 PM

THanks for the info 69 longhorn. From your pic, did the missing drivers side fender skirt fit? What are you using to cool the motor? i am going to use headers from a place called maximum torque specialties, www.500cid.com . there, i found when you scroll down to the bottom of the page and click on projects, wayne boggs 67 cad powered truck. it was helpful. longhorn, what tranny were you using, if it was the stock cad, what did you use as the crossmember?

[This message has been edited by Pumkin Truck (edited April 08, 2002).]

69 longhorn · 04-08-2002, 05:03 PM

the inners werent in. I run a 4 row core,& had a stock type fan. The trans was a med lenght 400 turbo(olds or buick),& had the stock crossmember(it needed to be moved). I have since gone back to chev(cheaper to build),but I think that the Cad is an awsome mill! Good luck.....69 longhorn.

[This message has been edited by 69 longhorn (edited April 08, 2002).]

Pumkin Truck · 04-08-2002, 08:12 PM

I just learned that the exhaust manifolds are going to have a clearance problems with the frame rails, does anyone know what type of headers would fit? thanks

69 longhorn · 04-08-2002, 10:33 PM

I didnt have any trouble with clearance, used a set of manifolds from a 78 sed deville......only draw back,these manifolds had a couple dimples that could be restrictive.The engine was also set back,& I had to cut & rework the firewall around the heads.......69

Longhorn Man · 04-08-2002, 10:39 PM

Follow the link..... http://www.500cid.com/mts/Rides/wayneb/index.html
I wanna do this swap into the Longhorn sooooo bad.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

04-08-2002, 03:58 PM	#2
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Sounds like a good Idea to me! ------------------ Charles W. Hein S. Williamsport PA imaindianoutlaw@yahoo.com REFRIGERATION TECH 1971 Rolling chassis FOR SALE 1963 Pontiac Tempest 1965 Pontiac GTO 1956 Pontiac 2 dr __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

04-08-2002, 04:20 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	I cant say on booster clearance,I did run a 425 cad in the longhorn for a while(manual brakes). You will need an eldorado pan & pick up,& watch the head clearance(#1 ,or the foward back is on the pass side on the Cad). The cad mounts are also foward ,as compaired to a chev,& there a couple different pump bottoms/filter adaptors. I didnt have to cut the crossmember with the 425 setup(for filter clearance). The stock manifolds for a sedan deville should fit ,Or some guys were using modiied BB chev headers,with a cad flange welded to them. You will love the dist clearance! Best to set it in, check clearance at the firewall,bubble level& go from there. Good luck....69 __________________ http://community.webshots.com/user/hotrodhorn

04-08-2002, 04:57 PM	#4
Pumkin Truck Thats just prime! Join Date: Mar 2002 Location: TEXAS Posts: 720	THanks for the info 69 longhorn. From your pic, did the missing drivers side fender skirt fit? What are you using to cool the motor? i am going to use headers from a place called maximum torque specialties, www.500cid.com . there, i found when you scroll down to the bottom of the page and click on projects, wayne boggs 67 cad powered truck. it was helpful. longhorn, what tranny were you using, if it was the stock cad, what did you use as the crossmember? [This message has been edited by Pumkin Truck (edited April 08, 2002).] __________________ 69 GMC short bed stepside with a wimpy six that can barely pull itself. 99 Chevrolet Camaro Z-28 1 Bad 5.7ltr LS1

04-08-2002, 05:03 PM	#5
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	the inners werent in. I run a 4 row core,& had a stock type fan. The trans was a med lenght 400 turbo(olds or buick),& had the stock crossmember(it needed to be moved). I have since gone back to chev(cheaper to build),but I think that the Cad is an awsome mill! Good luck.....69 longhorn. [This message has been edited by 69 longhorn (edited April 08, 2002).] __________________ http://community.webshots.com/user/hotrodhorn

04-08-2002, 08:12 PM	#6
Pumkin Truck Thats just prime! Join Date: Mar 2002 Location: TEXAS Posts: 720	I just learned that the exhaust manifolds are going to have a clearance problems with the frame rails, does anyone know what type of headers would fit? thanks __________________ 69 GMC short bed stepside with a wimpy six that can barely pull itself. 99 Chevrolet Camaro Z-28 1 Bad 5.7ltr LS1

04-08-2002, 03:54 PM	#1
Pumkin Truck Thats just prime! Join Date: Mar 2002 Location: TEXAS Posts: 720	gonna install a big motor and discs, help needed. Hey everyone, i recently picked up a front end from a 72 gmc with disc brakes. I also got the brake resiovor,if thats what you call it?(thing infront of the boosters) I think the swap should be fine. My questions are: the big motor is a 76 500cid cad with the 400 tranny. Anyone here ever installed one of these monsters in our trucks (my truck is a 69 gmc swb stepside with a wimpy six) from the looks of things i know that i am going to have to alter my driveshaft and fab motor mounts, do you think that the stock rad with electric fans or the fan from the cad will keep it cool and would i have to tear up my floor to fit the tranny in place? thanks for the much needed help. pumpkin truck. __________________ 69 GMC short bed stepside with a wimpy six that can barely pull itself. 99 Chevrolet Camaro Z-28 1 Bad 5.7ltr LS1

04-08-2002, 10:33 PM	#7
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	I didnt have any trouble with clearance, used a set of manifolds from a 78 sed deville......only draw back,these manifolds had a couple dimples that could be restrictive.The engine was also set back,& I had to cut & rework the firewall around the heads.......69 __________________ http://community.webshots.com/user/hotrodhorn

04-08-2002, 10:39 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Follow the link..... http://www.500cid.com/mts/Rides/wayneb/index.html I wanna do this swap into the Longhorn sooooo bad. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio



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