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Posted

Building a bad pro street chevelle and want a serious mill. Was looking at the 732 sonnys Gibson chevy. Anyone else make anything like this? Looking for at least 572. I would like to keep it single 4 barrel but do have room for the split dominators on the Gibson mill. Definately want sheet metal valve covers.

Posted

"Technically" for a model car, you can build your 732 starting with a 396 block. BBC's are essentially the same size, block wise, from the 396 up to the 672. There are some aftermarket blocks offered for the mega-motors but the only difference is in the deck height. The shape and physical size of the blocks are still the same.

Mark

Posted (edited)

"Technically" for a model car, you can build your 732 starting with a 396 block. BBC's are essentially the same size, block wise, from the 396 up to the 672. There are some aftermarket blocks offered for the mega-motors but the only difference is in the deck height. The shape and physical size of the blocks are still the same.

Mark

Well it's not exactly true...yes the large cu in engines are based on the old 396-454 design but if an engine has a taller deck it means that the engine gets both higher and wider as the cylinder heads are mounted higher up and furhter appart, so the physical size are not exactly the same.

But it's not that hard to do yourself, add some material to the deck surfaces on the block of a regular 396-454 and widen the intake manifold to fit between the heads and you have your tall deck "mountain motor".

Edited by Force
Posted

Well it's not exactly true...yes the large cu in engines are based on the old 396-454 design but if an engine has a taller deck it means that the engine gets both higher and wider as the cylinder heads are mounted higher up and furhter appart, so the physical size are not exactly the same.

But it's not that hard to do yourself, add some material to the deck surfaces on the block of a regular 396-454 and widen the intake manifold to fit between the heads and you have your tall deck "mountain motor".

Or use a 1/24th motor in a 1/25 kit.

Posted (edited)

Well that's not entirely correct either, these tall deck engines aren't larger in every direction, just higher and wider...not longer as the bore spacing often are the same as the engine they are based on.

But of course if the bore spacing is wider the engine gets longer, and with a wider bore spacing you can bore out the cylinders more, some have the cam shaft moved upwards also to allow for even longer stroke.

Edited by Force

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