Today’s mega-inch powerplants are the result of two decades of progression in engine technology, as the pursuit of cubic inches have snowballed, and the rules governing the different categories that utilize them have opened up.ĭuring the late 1980’s, Pro Stock teams were using the common large bore space big block engines of the time, namely the 4.900″ for the Ford camp and 4.840″ on the GM side. ![]()
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