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#1 |
Registered User
Join Date: Jun 2009
Location: Newnan, GA
Posts: 485
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engine mounts
Question, Are the 6cyl motor mounts and the v8 mounts the same. And when i say mounts i am referring to the "tower" "perches" that bolt to the frame rail and cross member. I am using the 6cyl mounts and i moved the motor forward 3 inches to the v8 mount spot, the top lines up however the single bolt on the bottom is not lining up with the hole. Whatca think is wrong? thats why i am questioning if there is a difference.
thanks
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#2 |
Registered User
Join Date: Jan 2009
Location: Springfield, Oregon
Posts: 84
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Re: engine mounts
No, you need v8 towers and they do mount in the forward holes.
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#3 |
Registered User
Join Date: May 2006
Location: Jonesboro, AR
Posts: 916
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Re: engine mounts
They are different but you can use them in the original I6 location with a V8.
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#4 |
Senior Member
![]() Join Date: Mar 2000
Location: Rockville,In. USA
Posts: 3,720
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Re: engine mounts
There are 5 different engine towers used in 67-72 2 wheel drives. They are as following
67-72 inline 6 cylinder 67-70 GMC V-6 67-72 SB V-8 68-71 BB V-8 72 BB V-8 If you leave the 67-72 inline 6cyl. engine towers where they were from the factory you can install a SB V-8 on them without needing to move the motor, just use I6/SB V-8 motor mounts ( yes inline 6 & SB V-* use the same rubber mounts. If using a HEI it puts it around 1 1/2" from the cowl firewall with the V-8 sitting in this position, you get better weight transfer, no need to lengthen drive shaft so you can continue using a 1pc drive shaft. If you have a manual transmission you'll need to do some minor mods to get linkage for clutch z-bar correct but its nothing major, if its a automatic you'll need to do nothing on linkage. I own 3 trucks done this way and I feel they handle better all around with the more even weight distribution having the V-8 further rearward on the Inline6cyl towers. GMCPaul By the way it leaves a 1 1/2" clearance to the firewall from the distributor using a HEI distributor IF YOUR CAB MOUNTS ARE GOOD, I've seen trucks where the cab mounts were shot and the cab was sagging so much they beat the firewall with a hammer to clear the distributor, after mounts were replaced they then had a good 3" clearance. So check your cab mounts. Last edited by GMCPaul; 04-16-2010 at 09:48 AM. |
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#5 |
Registered User
Join Date: Jun 2009
Location: Newnan, GA
Posts: 485
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Re: engine mounts
I was going to use the original inline 6 mounts and location. but not enough room for my liken. already have the drive shaft just need to go hunt the mounts. thanks for the responses
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