Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

305 to 350 info

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Old Oct 28, 2011 | 06:17 PM
  #1  
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From: Nc
Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
305 to 350 info

Can some one point me in the right direction, I have a 91 305 tbi I want to swap in a 327/350/355/383..... Need info or a thread that can show me everything I need to know on the swap. Like swapping the motor and being able to keep my gauges, or if I need to change them, yada yada!!! Thanks
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Old Oct 28, 2011 | 06:24 PM
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: 305 to 350 info

Originally Posted by Badrs2810
I want to swap in a 327/350/355/383..... Need info or a thread that can show me everything I need to know on the swap.
Whats to know.
You are taking out one SBC and replacing it with another.
Everything that fits on your old engine will fit on the new one ( assuming you don't buy some real early engine that doesn't have all the holes in the heads drilled and threaded.)
You need a flywheel to suit your new engine , the one you have now may not fit

More importantly ,you don't mention what intake you plan to use????
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Old Oct 28, 2011 | 06:29 PM
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From: Nc
Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
Re: 305 to 350 info

Sorry, preferably a performer eps or rpm. And if I went with any new-ish motor, I could see that, but what if I used a 67-69 Camaro 327 or 350? Those are more abundant here and complete, low-ish (100,000-150,000) miles, for about 300$
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Old Oct 28, 2011 | 07:48 PM
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From: NC
Car: 91 Trans Am
Re: 305 to 350 info

Skip the old engines and go for a 96-99 truck 350
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Old Oct 28, 2011 | 07:57 PM
  #5  
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From: Nc
Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
Re: 305 to 350 info

Why?? Easier, cheaper, etc? What's your reasoning?
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Old Oct 28, 2011 | 07:59 PM
  #6  
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: 305 to 350 info

Originally Posted by Badrs2810
what if I used a 67-69 Camaro 327 or 350?
As noted ,
most early heads don't have the holes tapped for mounting the accessory brackets used on later engines like yours.
Can be drilled and tapped but extra cost over buying engine with correct holes

Originally Posted by Badrs2810
What's your reasoning?
Later model engine is better base to build on.
Roller cam ,1 pce pan gasket,etc
96+ Vortec truck engines are common , cheapish and have great heads.
Vortec heads are better than race heads you would find on any '60's engine ; let alone a stock engine like you are looking at

Last edited by vetteoz; Oct 28, 2011 at 08:04 PM.
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Old Oct 28, 2011 | 08:02 PM
  #7  
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From: Nc
Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
Re: 305 to 350 info

Good point! I'm sold. So the previous statement, truck 350... Good choice?
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Old Oct 28, 2011 | 08:09 PM
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From: NC
Car: 91 Trans Am
Re: 305 to 350 info

Of course

Choices were 305 (uncommon and lame), 350 (90% got them), wierd underpowered BBC and diesel for those years
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Old Oct 28, 2011 | 08:29 PM
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From: Nc
Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
Re: 305 to 350 info

Ok so could someone post a start to finish thread? I need the motor, my tranny(t-5)? ECM, and time? I have a tbi right now, but I kinda wanna do carb setup.
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Old Oct 28, 2011 | 08:57 PM
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From: NC
Car: 91 Trans Am
Re: 305 to 350 info



This isnt exactly an uncommon swap
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