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  #1  
Old March 21st, 2019, 09:14 PM
KKyzer KKyzer is offline
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Default 8.1 install

Has anyone ever attempted to install a GM 8.1 into one of your trucks? Did a little research and appears I might have to cut the firewall, may have issues clearing my D60 in front, have to use a 12" clutch. I'm looking at investing in one a little time and money, but kinda worried about fit, parts to install and mate up to my SM465/205.

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Old March 22nd, 2019, 05:51 AM
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Barrman Barrman is offline
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The 8.1 is just a tall deck Big Block Chevy, right? They have been fitted with the big clutches by several people. I had a 396 in mine for a number of years.

However, if you use the Novak kit, the engine will be into the firewall on the passenger head. That happens with regular small blocks as well with that kit.
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Old March 24th, 2019, 07:37 PM
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Rather than cut the firewall, I would move the trans forward a bit and use a longer stub shaft (if retaining the divorced transfer case).
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Old March 26th, 2019, 04:47 PM
KKyzer KKyzer is offline
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Thanks for the input. More thinking about it and Im not gonna go with the 8.1. I really want torque and seems to get that, Id have to really build up a motor or go diesel. That being said, I picked up a 91 Dodge 12v Cummins truck as a donner today.
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Old March 27th, 2019, 07:46 AM
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It will be more work and money. However, I think you will be a happy driver when it is done.
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Old March 27th, 2019, 12:30 PM
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Quote:
Originally Posted by Barrman View Post
It will be more work and money. However, I think you will be a happy driver when it is done.
Barrman, Didn't you do a Cummins 5.9 swap for someone with your students? Maybe you can give a little insight to the job?
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Old March 27th, 2019, 01:31 PM
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Quote:
Originally Posted by KKyzer View Post
Thanks for the input. More thinking about it and Im not gonna go with the 8.1. I really want torque and seems to get that, Id have to really build up a motor or go diesel. That being said, I picked up a 91 Dodge 12v Cummins truck as a donner today.

Good boy
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Old April 1st, 2019, 03:51 AM
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Yes I did Joe. Actually, still doing the truck. However, when it comes to the 6BT. I refer people to Mikel and all his post. He has many more complete and running down the road trucks out there than I do.
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Old April 1st, 2019, 04:19 AM
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Quote:
Originally Posted by Barrman View Post
Yes I did Joe. Actually, still doing the truck. However, when it comes to the 6BT. I refer people to Mikel and all his post. He has many more complete and running down the road trucks out there than I do.
He also does a really sweet job of putting an extra axle in them too.
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Old April 1st, 2019, 04:55 PM
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Thank you, but there are cleaner conversions in this site
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