318 4" bore 3.58" stroke(360)

RustyRatRod said

Hensley Motorsports has been hoggin out 318s to 4 plus inches for thirty years. They don't hard block anything.

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Wow! I hope mine holds up to street use with an occasional pass at the 1/8th mile track down the road, never raced before though, so time will tell. This block is a "4 ear" engine mount block if that means anything. Probably not.