the tranny is a sm465 toploader transmission,has a ultra low granny gear and then a 3 speed w/rev.its a cast iron case
used in 1/2 thru 1 ton chevy trucks from somewhere in the late 60's early 70's thru late 80's.
ive got the flywheel spacer to use a th350 or th400 behind the 5.3 but now im going with this manual trans setup.
thanks
andy