Thread: 350 to a 383

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Stock main caps are iron, like a block. Steel is much stronger. Splayed main caps are even better, but you have to convert a 2 bolt block for that. I wouldn't worry about that, however.

I have a 383 builded up and it has 10 5 to 1 comp. Flat tops bored 30 over with a hot cam and it runs fine on 93 octane. It does a little better with a oct booster added.. It dyno at 513 hp and 498 toruqe. It is not a daily driver due to gas mileage and the cam. It is a 41 chevy Hot rod for cruise night. Theres no way you can run 13 to 1 on pump gas and as a daily driver. It would make a good car for the strip but thats about it.And yes speed and hp cost.