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Message: <blockquote data-quote="95PGTTech" data-source="post: 593280" data-attributes="member: 9525">Correct, a 331 is a stock-block 302 with a longer stroke. a typical kit comes with rods, pistons, crankshaft, main and rod bearings, rings, some gaskets. again, it would be better to buy pre-assembled or even used. combine with a nice aftermarket cylinder head like an afr205. bought used, you could get an entire longblock for that $4-5k price.I'd seriously suggest just buying a used supercharger kit and go from there. get the power pipe, a smaller pulley or an aftermarket crankshaft pulley, some injectors, a maf, and get it tuned. you can easily make 400 to the tire through the stock longblock. if you get to that point and still want more, then worry about the motor internally and the heads. this method also leaves you room for your LTs and T56.</blockquote>