Quote:
Originally Posted by 94cobra69ss396
The main support and the valley girdle are two different things. The main support ties all the main caps together. The valley girdle is like a truss that stiffens the valley to help keep the block from flexing.
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I've actually seen 302 blocks that split right down the middle of the valley. That's why I installed a valley girdle and main girdle on my 347 stroker once I cranked it up over 550 HP.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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