Why do I want it? Soon I'll have a moded LS2 engine with approximately 630 torque & probably 750 rwph ( it's being built now) Because I have the M12 trans I want the 3.15 and not the 3.42. The standard 3.15 GM had put into their automatics won't hold up. So I contacted Getrag in North Carolina and asked for their heavy duty 3.15. I was told they could build it for me in a few days, but they would require the General's permission which they wouldn't have till end of summer. Does anyone else make a heavy duty 3.15? Thanks in advance.