I modified this to 1979 pontiac firebird with 301 block, going to put 350 soon. the input shaft stay the same because i compensate the distance to the pilot bearing with adapter thickness that why looks thick, and i used 1999 mustang pilot bearing same size OD jest have to mashinet back of the bearing sleeve litle bit . this adapter for long T5 input shaft 1994 and up...
thank you for asking