No other responses, well I'll start. Chevy used the 400 behind the big blocks for a reason. That's not to say a properly rebuilt 350 won't hold up but if it's still at stock specs it's not going to take the abuse a 400 will.
If you have a couple of 350's throw one in and see how it holds up. I know it's work installing it but if you have them it won't really cost anything.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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