Trans Adapter

must use 98-99 full size 1500 chevy pickup with 4.3 or 5.7....    or 98-2014 full size chevy van with 4.3 or 5.7.  LS trans will not work.  so to simplify things, any of the 4l60e transmissions with removable bellhousing, that didnt come from an LS engine application with work.  64 to 66 engine direct bolt on (provided flexplate has the 300 converter pattern.).  57 to 63 requires centering bushing for crank (40) , special flexplate with ring gear (185) and starter spacer for use with dynaflow starter (65) or mini starter.