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Old 09-14-2018, 11:12 PM   #26
LostMy65
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Re: Crate GoodWrench 350 Questions

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Originally Posted by Warrens69GMC View Post
1978 Big 10, 165hp 350, TH350, 3.08 and 28" tires. Doesn't do too bad, except loaded and going uphill.
You might need 3.42 rear gears.
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Old 09-14-2018, 11:25 PM   #27
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Re: Crate GoodWrench 350 Questions

Or a Duramax transplant
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Old 09-15-2018, 09:20 AM   #28
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Re: Crate GoodWrench 350 Questions

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You might need 3.42 rear gears.
I have a 1995 LT1 and 4L60E from a camaro, thinking of 3.73 gears as well.............🤔
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Old 09-15-2018, 08:47 PM   #29
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Re: Crate GoodWrench 350 Questions

I've been doing research, is it true they built it with really low compression so the engine could use low octane gas?
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Old 09-15-2018, 10:10 PM   #30
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Re: Crate GoodWrench 350 Questions

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I've been doing research, is it true they built it with really low compression so the engine could use low octane gas?
The goodwrench 350? Yes that is partially true. They wanted a economical engine that could be put in most 1985 and under cars and trucks and pass emission standards everywhere. If the made a 350hp 350, it might not pass some emission requirements.
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Old 09-16-2018, 09:45 AM   #31
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Re: Crate GoodWrench 350 Questions

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1978 Big 10, 165hp 350, TH350, 3.08 and 28" tires. Doesn't do too bad, except loaded and going uphill.
Agreed, mostly stock 283 with 225/75/15 tires and 3 on the tree. 3.08 is great
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Old 09-16-2018, 11:24 AM   #32
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Re: Crate GoodWrench 350 Questions

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1978 Big 10, 165hp 350, TH350, 3.08 and 28" tires. Doesn't do too bad, except loaded and going uphill.
My 78 big 10 is just like yours, stock 350/TH350 and 3:08, and will hold 70 with the AC on using the cruise going uphill with out any trouble.
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Old 09-16-2018, 12:12 PM   #33
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Re: Crate GoodWrench 350 Questions

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My 78 big 10 is just like yours, stock 350/TH350 and 3:08, and will hold 70 with the AC on using the cruise going uphill with out any trouble.
I agree. I was referring to it loaded AND going uphill. Like with a 1500 slide in camper and another 700lbs worth of stuff inside.
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Old 05-10-2021, 12:32 PM   #34
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Re: Crate GoodWrench 350 Questions

Quote:
Originally Posted by Warrens69GMC View Post
The goodwrench 350? Yes that is partially true. They wanted a economical engine that could be put in most 1985 and under cars and trucks and pass emission standards everywhere. If the made a 350hp 350, it might not pass some emission requirements.
I'm not sure why I missed this post before.
That totally makes sense. I just couldn't figure why they would deliberately build it to be a dog - It needs to pass emissions in every State in every car.
Here in Oregon anything around 1974 and older doesn't have to do an emissions test.
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Old 05-10-2021, 01:34 PM   #35
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Re: Crate GoodWrench 350 Questions

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Is there a way to know what horsepower version my GM Goodwrench 350 is?
I found this in another thread:
https://www.mortec.com/location.htm
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