I-6 towers and V-8 tower differences? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

racerman85 · 10-31-2007, 06:51 PM

Hey guys I was hoping to toss my V8 in tonight but I was wondering if there is a difference between the V8 towers and I6 engine towers? Thanks

Chevy4Life · 10-31-2007, 07:09 PM

I used the I6 towers to install my SBC. They set the motor back about an 1-1/2 or 2 inches and maybe a little lower. I measured this once but don't remember exactly. It makes an HEI a little tight back there but no issues. I wanted the motor back as far and low as possible for center of gravity reasons.

The 292 uses staggered mounts and won't work.

**Palf70Step** · 10-31-2007, 07:35 PM

Far as I know that is about the only difference between the I6 and SB towers is how the holes are made to where they bolt onto the frame.

As mentioned if you use the I6 towers it will set the engine back. Your distributor will be tight, but should clear fine.

jugernot · 10-31-2007, 07:49 PM

I did the same thing, only after I had my inline 6 towers powder coated. There is the thread I started with some pictures of v8 towers installed. I hope it helps. The motor sat a little too close to the firewall for me, so I bought V8 towers.

http://67-72chevytrucks.com/vboard/s...d.php?t=228793

bw4sale · 11-01-2007, 09:23 AM

I have a 305 in mine on I6 towers. I was hoping to switch them out. Anyone know if this will cause any problem anywhere else? i.e. tranny crossmember or driveshaft length

67ChevyRedneck · 11-01-2007, 09:42 AM

Towers are completely different. V-8 towers won't mount in the I-6 location and vice versa. They mount at different points on the suspension crossmember (the v-8 to the front and the I-6 to the rear) and because of the crossmember mounts, they are angled/shaped differently which makes them not interchangable between the two locations.

BUT you can mount a v-8 in the I-6 position. As stated above the dizzy is just really close to the firewall.

67ChevyRedneck · 11-01-2007, 09:44 AM

Quote:

Originally Posted by bw4sale

I have a 305 in mine on I6 towers. I was hoping to switch them out. Anyone know if this will cause any problem anywhere else? i.e. tranny crossmember or driveshaft length

Switching them out will require you moving the engine a couple inches forward, which would mean a lengthened driveshaft. If you have a manual I don't know if you can do this, because you can't move the 3 speed crossmember forward. If you have an auto or a manual with the rear crossmember, the crossmember will need to move forward.

10-31-2007, 06:51 PM	#1
racerman85 Registered User Join Date: Nov 2006 Location: Windsor, PA Posts: 318	I-6 towers and V-8 tower differences? Hey guys I was hoping to toss my V8 in tonight but I was wondering if there is a difference between the V8 towers and I6 engine towers? Thanks

10-31-2007, 07:09 PM	#2
Chevy4Life Senior Member Join Date: Feb 2003 Location: Las Vegas, NV Posts: 749	Re: I-6 towers and V-8 tower differences? I used the I6 towers to install my SBC. They set the motor back about an 1-1/2 or 2 inches and maybe a little lower. I measured this once but don't remember exactly. It makes an HEI a little tight back there but no issues. I wanted the motor back as far and low as possible for center of gravity reasons. The 292 uses staggered mounts and won't work. Last edited by Chevy4Life; 10-31-2007 at 07:15 PM.

10-31-2007, 07:35 PM	#3
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,471	Re: I-6 towers and V-8 tower differences? Far as I know that is about the only difference between the I6 and SB towers is how the holes are made to where they bolt onto the frame. As mentioned if you use the I6 towers it will set the engine back. Your distributor will be tight, but should clear fine. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

10-31-2007, 07:49 PM	#4
jugernot Life, Be In It..... Join Date: Oct 2003 Location: Novato, California Posts: 1,498	Re: I-6 towers and V-8 tower differences? I did the same thing, only after I had my inline 6 towers powder coated. There is the thread I started with some pictures of v8 towers installed. I hope it helps. The motor sat a little too close to the firewall for me, so I bought V8 towers. http://67-72chevytrucks.com/vboard/s...d.php?t=228793 __________________ Project Name: LEMON DROP. Reconstruction started "December 2000". Projected completion date "Who knows" http://67-72chevytrucks.com/vboard/s...d.php?t=200082

11-01-2007, 09:23 AM	#5
bw4sale Registered User Join Date: Sep 2006 Location: Hendersonville, TN Posts: 1,528	Re: I-6 towers and V-8 tower differences? I have a 305 in mine on I6 towers. I was hoping to switch them out. Anyone know if this will cause any problem anywhere else? i.e. tranny crossmember or driveshaft length __________________ BRENT -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half

11-01-2007, 09:42 AM	#6
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: I-6 towers and V-8 tower differences? Towers are completely different. V-8 towers won't mount in the I-6 location and vice versa. They mount at different points on the suspension crossmember (the v-8 to the front and the I-6 to the rear) and because of the crossmember mounts, they are angled/shaped differently which makes them not interchangable between the two locations. BUT you can mount a v-8 in the I-6 position. As stated above the dizzy is just really close to the firewall. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!



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