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1969 383 in a 91 RS??

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Old 09-03-2007, 09:38 PM
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1969 383 in a 91 RS??
I have a 350 4-bolt main out of a 1969 Impala. I am planning to make this engine into a 383 stroker. I was wondering if the engine mounts would match up correctly. I will be bolting the 383 up to a 700-R4 transmission. In addition, I am planning to put a 750 Holly Double Pumper on the manifold. Will I need to buy a special type of wiring harness to ensure the carburetor will work?

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Old 09-03-2007, 09:47 PM
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Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 1969 383 in a 91 RS??
The engine mounts are the same, but the flexplate is different because of the change in the rear main seal.
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Old 09-03-2007, 10:49 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
You don't need a "special" harness, but you will need to modify what you've got slightly.
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Old 09-04-2007, 02:53 PM
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Re: 1969 383 in a 91 RS??
Thanks for all your replies; I just have a couple more questions. What is the best type of flywheel (brand) and what modifications should I do to the wiring harness?

Thanks again
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