Fastest auto trans for SB chevy stocker

One thing about the Pro Trans is the all the gear ratios offered. Metrics not so much. The metric 200 is very close. If you go with a metric, Remac, or Sepanek is my choice. Obviously McClay is a top choice as well.

I have one from Remac in my Firebird, and it has 200 runs on it since the original build. It is overdue for a freshen up. It will go to Sepanek for that