Jeff, this is going to be the rest of the engine combo. Starting with a stock 302 block, machined to a 306 or 308, I'm going to put in a M6303A50 cast steel crank, PRO-Line 5140 "I" beam rods and TRW forged pistons. I want the whole rotating assembly balanced after the builder removes some material from the pistons just like in the Pro Stock engines. This engine combo in a street Mustang won't run 10's like Pure Street cars, but hopefully it will scare a few LS1 GM cars out there.
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