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Engine swap on a 1984 Pontiac Firebird

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Old 10-11-2018, 12:15 AM
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Car: 1984 Pontiac trans am
Engine: Original engine
Engine swap on a 1984 Pontiac Firebird



Hello all. New to this thread and site. I recently picked up a 1984 Pontiac Firebird, the engine is original, and still in good running condition(68,000 original miles). I wanted to eventually swap out the motor. My goal is to have a daily driver, but with some kick in the horse power. My mechanic joked and said we should put a corvette engine in, but reading these threads, it seems the more horse power, the more you have to re-enforce the frame? Also, I am unaware of everything I will be getting myself into when I begin this process, I have a rough idea of how much engines cost, but I would like to hear from people that have already been through this, or know what to expect, what needs to be done to the frame, what possible problems I might come across(as you can probably tell, I’m not a mechanic). I am by no means rich, and will have to achieve this restoration over time, so any advice, any ways to avoid mistakes, any and all suggestions are so much appreciated. Thanks in advance.
-Jason
Old 10-11-2018, 06:57 PM
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Re: Engine swap on a 1984 Pontiac Firebird

Thank you
Old 10-11-2018, 08:11 PM
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Re: Engine swap on a 1984 Pontiac Firebird

Could start maybe looking into the suspension and brake systems upgrade and maybe subframe connectors. Thats what i did while i am stuck between swapping in a 350 stock or planning for future ls3 erod engine since im in california and desire same as your goal,faily driven with some nice power for the fun times
Old 10-11-2018, 08:53 PM
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Re: Engine swap on a 1984 Pontiac Firebird

Originally Posted by Jcampus2095
it seems the more horse power, the more you have to re-enforce the frame?
Ehh, not really. Power to frame strength isn't really the issue. They get stress cracks, and creaks or rattles regardless of power. The weakest V6 or 4cyl thirdgen will benefit from the various bracing found on more performance oriented thirdgens, and subframe connectors. No one is twisting a thirdgen in half just because they put a powerful engine in one.

The expense of an engine swap isn't really the cost of the engine, it's the nickle and dime stuff that you'll want to address while you're at it. The cleaning, detailing, small parts that will need changed, regular preventive maintenance items, etc are where you'll spend the money. Who puts in a brand new engine with a used waterpump, used starter, used radiator? Themostat, gaskets, hardware, hoses, wiring, well you get the idea.
Old 10-12-2018, 12:20 AM
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Re: Engine swap on a 1984 Pontiac Firebird

You can pickup a crate Vortec 350 these days for around $1800. Can swap and Alex spring kit and you have a 300hp engine that easy.Sometimes you can run across good deals on lower mileage 350s cheap because so many folks are going LS. I picked up a 70k mi L98 for $500 not long ago from a guy going to an LS. I will have more $ in the little things Drew said than the engine itself. You could also put a cam, better heads, intake, and carb on your 305 and probably have plenty of power it's just according to what you want, and what you want to spend.
Old 10-13-2018, 11:58 AM
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Re: Engine swap on a 1984 Pontiac Firebird

Yeah I see what you’re saying, that’s where I don’t want to make any mistakes.. thanks for pointing that out, changing the wiring, radiator, pumps, etc..
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