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Old 11-16-2007, 03:56 PM
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how much will it weigh me down?

hey guys when i go down the local turn pike my 1987 Firebird hugs the ground(at75mph-90mph) now what would happen if I changed my 305 carb to a 455 monster, and what would i have to change to the weight distribution to keep it the same?

Any help would be thankful!

Dave

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Old 11-16-2007, 05:52 PM
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I like your thinking! I have a 455 ready to build for my '68 firebird. I'm not sure you will ever get the same weight distribution but if you shift the motor towards the firewall you should be able to get some of the weight off the front tires(front heavy car = poor handling)....may have to alter the firewall for distributer clearance. I'm sure if you search the net you can find someone that has done it. I'm the last person to tell you to put a chevy motor in a pontiac but your best bet would be a hi-po 350.
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Old 11-17-2007, 04:25 AM
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F-bodies are already a little light in the tail, but I've known a few who have done the swap. Springs are a must. If you're hugging the ground with a 500-lb chevy, you'll be really hugging it with a 630-lb pontiac.

Two ideas... Caddy 500 (only a few pounds heavier than an SBC) or a Buick 455 (in between the SBC and pontiac)

The bottom line is, if you really want big cubes, its going to be tough to maintain handling and traction. They are already heavy on the front and a big heavy engine swap will only make it worse.

How about an LS1? Its a common swap and you lighten the front by LOTS of pounds.
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Old 11-19-2007, 02:56 PM
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thanks

Well i was thinkin a small block but i mean its a overly common swap, and it just sounds really cool for a Third Gen to have "a 455 up under the hood" as stated by a Famous Country singer. And no offense but everyone that uses the LS1 swap is just trying to be a lil special, but thats too common for me too! but thanks for the advice on the position of the motor, and i thought i might have to put it far enough back, but if i could get my hands on a 383 or even a 396 i would be pretty happy, but thanks anyway anymore information would be helpful thanks.

Sincerely Dave Strider
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