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Old 11-25-2003, 04:22 PM
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454 or 427 for 70 Chevelle?

Hello all, I have a 70 chevelle that I'm restoring. It's a plain jane 307 at car now, but I see a big block in it's future. I was thinking a 454 or even a 496, but a friend of mine insists that a 427 would be best. I've never owned a big block, and the only two that I drove where a worked 396 in a 66 impala with a 4spd (2.20 1st) and 2.73 gears, and a 454 in a 66 impala with a richmond 5spd and 3.31's. The 454 was a stock rebuild (with too many miles on the rebuild) from a 75ish suburban.

The argument was raised that a 454 doesn't rev as fast as a 427 and therefore it'd be slower. I said that's fine in a Nova or a Camaro, but in the Chevelle I'd want more torque.

Also there is the issue of it costing more to build a 427 as cores cost more. The other way is to use a 396/427 crank in the 454, but if I have a complete 454, why buy another crank... Just thought I'd kick the idea around a little...

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Old 11-25-2003, 04:31 PM
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Beater I would go with the 454. The chevelle is a heavy chevy. You will need the extra torque from the 454 rather then the high rpm horsepower from the 427.
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Old 11-25-2003, 05:28 PM
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Quote:
Originally posted by Hot Rod/SS
Beater I would go with the 454. The chevelle is a heavy chevy. You will need the extra torque from the 454 rather then the high rpm horsepower from the 427.
I agree with the above quote If you want to build a screamer then go with the 427. As suggested you are better off with the 454
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Old 11-25-2003, 05:29 PM
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IMPO, I would go with the 454. It's an "easier" rebuild since there's no special parts to buy. There's tons of torque from a 454 at low if it's built right, and would be a great street monster. BBC's are a little more expensive than SBC's, but well worth the look and sound of em. Good luck on what ever you choose.
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