Looking for Mopar Engine Rebuilder Near San Bernardino

Would anyone know the difference from a B&M shift kit and a transco shift kit for a 727 torqflite. I want to rebuild my transmission with a stage 2 for street/strip ?
I don't think you have a bad question here but you would probably do better by starting a thread in the transmission section then just tackling this question in the middle of someone's engine rebuild thread...