I just purchased a 331 kit from The Mustang Depot out of Cali, $996.00 with flat top pistons, racing lightweight rods, bearings, rings, the whole nine yards. The piston are flycut and everything for my TW heads. I will be bringing the block to have it boiled and tested, and have new cam bearings and such installed. But I was pushing close to 350hp with this stock block and it has held up, so with the main girdle and everything, i think it will be fine for the extra 50 or 70 hp I will be trying to sqeeze out of it.
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