Hi, I have an aftermarket 383 crank, 153 tooth 12" 350 flexplate, balance plate to go with it, 350 pistons, 400 rods, and I wanted the lighter wieight 6 3/4" damper also. Is this the same balancer for the 383/400 as the 350? Thanks, Scott

It depends on your rotating assembly. Though my stroker crank was spec'd as "external balance", my machinist had a much easier time with internally balancing it. So I had to replace my external balance damper and flexplate with internal balance pieces.