Replacing 6 cyl with 8 cyl. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

grs · 12-18-2011, 01:44 PM

I had a 69 with a 350. and 400 trans. Sold the engine and trans, and drive shaft. The person who bought them, put them in a 68. The 68 had a 6 cyl. The drive shaft is too short. Does a 6 cyl sit back further then an 8 cyl.?

54Caddy · 12-18-2011, 01:48 PM

My dads 68 6cyl did sit back further. so with the v8 in it now the distributor is close to the firewall.

grs · 12-18-2011, 01:59 PM

Quote:

Originally Posted by 54Caddy

My dads 68 6cyl did sit back further. so with the v8 in it now the distributor is close to the firewall.

Thanks that is what I needed to know.

HavinSomeFun · 12-18-2011, 02:01 PM

Did they use the 6 banger motor stands or switch to the V8 stands. Also, did they move the mount locations. These trucks have two sets of holes in the frame for the stands.

grs · 12-18-2011, 05:55 PM

Quote:

Originally Posted by HavinSomeFun

Did they use the 6 banger motor stands or switch to the V8 stands. Also, did they move the mount locations. These trucks have two sets of holes in the frame for the stands.

I don't know what they did, but I think they got it figured out. Thanks

schurg · 12-18-2011, 11:09 PM

so, are the front mounts for the 8cyl then? I bought my truck with a 350 already in it, and the distributer is right up against the firewall.

chopnchaneled · 12-19-2011, 03:42 PM

I found that using the stock 250 6 cyl. mounts in the stock location on the frame with a 350 v/8 will put the dist right next to the fire wall.

*Fitz* · 12-19-2011, 05:24 PM

Quote:

Originally Posted by chopnchaneled

I found that using the stock 250 6 cyl. mounts in the stock location on the frame with a 350 v/8 will put the dist right next to the fire wall.

That's why GM put a bump in the firewall...to make room for big blocks!

schurg · 12-21-2011, 06:10 PM

12-18-2011, 01:44 PM	#1
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	Replacing 6 cyl with 8 cyl. I had a 69 with a 350. and 400 trans. Sold the engine and trans, and drive shaft. The person who bought them, put them in a 68. The 68 had a 6 cyl. The drive shaft is too short. Does a 6 cyl sit back further then an 8 cyl.?

12-18-2011, 01:48 PM	#2
54Caddy GM Addicted Join Date: Jan 2009 Location: Visalia, Ca Posts: 2,291	Re: Replacing 6 cyl with 8 cyl. My dads 68 6cyl did sit back further. so with the v8 in it now the distributor is close to the firewall. __________________ ..Mac’s Garage.. 73 GMC, 54 Caddy, 2010 Silverado, 68 C10 RIP DAd My 73 GMC Truck Build Pic 2010 Silverado 4/6 on 24s IG:MacsGarage

12-18-2011, 02:01 PM	#4
HavinSomeFun Still Just Havin Some Fun! Join Date: Jun 2007 Location: Piedmont, Oklahoma Posts: 1,145	Re: Replacing 6 cyl with 8 cyl. Did they use the 6 banger motor stands or switch to the V8 stands. Also, did they move the mount locations. These trucks have two sets of holes in the frame for the stands. __________________ a green one with some stuff done to it....

12-18-2011, 11:09 PM	#6
schurg Registered User Join Date: Apr 2011 Location: richmond, va Posts: 140	Re: Replacing 6 cyl with 8 cyl. so, are the front mounts for the 8cyl then? I bought my truck with a 350 already in it, and the distributer is right up against the firewall.

12-19-2011, 03:42 PM	#7
chopnchaneled Registered User Join Date: Dec 2009 Location: Atlanta, Ga. Posts: 1,050	Re: Replacing 6 cyl with 8 cyl. I found that using the stock 250 6 cyl. mounts in the stock location on the frame with a 350 v/8 will put the dist right next to the fire wall. __________________ I don't think we get smarter as we get older. We just run out of Stupid things to do.

12-21-2011, 06:10 PM	#9
schurg Registered User Join Date: Apr 2011 Location: richmond, va Posts: 140	Re: Replacing 6 cyl with 8 cyl.



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