SMR transmissions B/RB to small block transmission adapter kit. Part number SM 99-100P for a 6 bolt crank. New in box, the box has been opened but only for inspection, never installed the kit. for info: https://smrtrans.tripod.com/smrtransmissionsintro/id9.html $400 + shipping PM here or phone (716) 655-0625 ask for Gary or leave a message ( this is a land line)