It can't be emphasized enough, build the trans first!! Like the guy above said. Build the trans, follow that up with efi live and a lift pump and see if u want to go farther. From what I've been reading the batmo is all about drivability anyway. Small power gains if any. A guy on duramaxdiesels saw no improvement on 1/4 times with the batmo but the spool up was quicker and the street manners improved.