yes the 4367 is for a -70 383 hp-4speed.it has 1-9/16" primarys and 1-3/4" secondaries.the auto trans 4368 has a lid held with 2 screws on the body on the throttle side,with a valve something behind the lid.the 4speed 4367 have no lid there and the holes for the screws are not threaded,and there is a small plugg in there instead of the valvesomething.