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I have a 383 gm block callies compstar crank and rods srp pistons. Dart heads iron eagle heads crower lifters comp springs comp 7/4 swap cam victor jr intake mallory dis.The bottom end has 500 laps since new the heads were gone thru with springs lifters cam timing chain rockers all replaced 250 laps ago. 3500 obo call 740 456 7015 with any questions thanks