[CO] 1986-90 350 Engine

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Old Jan 28, 2026 | 09:20 AM
  #1  
deektheoutlaw's Avatar
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From: Colorado
Car: 1989 Firebird Formula
Engine: 5.7 350 TPI
Transmission: 700R4
1986-90 350 Engine

I would like to replace the motor in my 1989 Formula 350 this year. If anyone in Colorado is sitting on a fresh-built 350 longblock I'm very interested in buying one.

My car is TPI equipped. I would like a motor I can swap my current engine's accessories directly onto (the fuel system works fine).

Ideally looking for a Goodwrench 350 crate replacement.
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Old Jan 28, 2026 | 03:43 PM
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scottycamaroz28's Avatar
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From: North Central Indiana! GO IRISH
Car: 89 PONTIAC TRANS AM
Engine: 5.0 TPI
Transmission: Stock 4SP 700R4
Axle/Gears: 4TH GEN 3:23
Re: 1986-90 350 Engine

Not sure what your budget might be? I have had great success now with 2 Blueprint crate engines. They use both seasoned and new 4-bolt 1 piece rear main roller blocks for thier builds. It sounds like you want to keep the TPI setup, so a short block would work if you want to keep your heads or long block to put your intake setup and accessories on it. They make engines in whatever power you are looking for and however built up you want it from mild to wild and from short blocks to pretty much turn key.
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Old Jan 29, 2026 | 09:32 PM
  #3  
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Car: 89 GTA
Engine: 350
Transmission: auto
Axle/Gears: 3.23 BW 9 bolt
Re: 1986-90 350 Engine

On fb market place a guy is selling freshly rebuilt 350 from a 96 truck I think, so a vortec block, for $600 in the Denver area. When I messaged him, he really didn't give me any info on it other than that his brother and himself built it and now plans have changed.
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Old Jan 31, 2026 | 12:12 PM
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deektheoutlaw's Avatar
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From: Colorado
Car: 1989 Firebird Formula
Engine: 5.7 350 TPI
Transmission: 700R4
Re: 1986-90 350 Engine

I don't use Facebook anymore, I quit that last year for good and it's been great, but sure makes finding deals harder. I was always frustrated by people listing things but not properly replying, if at all. I tried to buy a Formula hood from a guy in Denver 2 years ago, cash in hand, but he would not reply back to me more than once a week. I have been searching Craigslist for a motor but no luck so far
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Old Jan 31, 2026 | 12:14 PM
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deektheoutlaw's Avatar
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From: Colorado
Car: 1989 Firebird Formula
Engine: 5.7 350 TPI
Transmission: 700R4
Re: 1986-90 350 Engine

Originally Posted by scottycamaroz28
Not sure what your budget might be? I have had great success now with 2 Blueprint crate engines. They use both seasoned and new 4-bolt 1 piece rear main roller blocks for thier builds. It sounds like you want to keep the TPI setup, so a short block would work if you want to keep your heads or long block to put your intake setup and accessories on it. They make engines in whatever power you are looking for and however built up you want it from mild to wild and from short blocks to pretty much turn key.
I'm honestly open to any ideas. Definitely keeping the TPI setup as I've spent the past 4 years getting it to run fairly well (knock on wood!) I know Blueprint is a big name, saw them a lot on Roadkill and other places. I'll check those guys out too.
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Old Jan 31, 2026 | 12:17 PM
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From: Colorado
Car: 1989 Firebird Formula
Engine: 5.7 350 TPI
Transmission: 700R4
Re: 1986-90 350 Engine



For $5200 that seems like you can do absolutely no wrong. That's exactly what I'm after
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