SM420 was used in GM trucks till 67, then they went to the SM465. (40# heavier, about 1.6" longer, and not as low granny and PTO on both sides, plus a backup light switch!) You should be able to get the tranny and bellhousing etc from a newer truck and drop in there. Is this going in your 49? How about park brake? a tranny out of a 1/2 or 3/4 ton won't have the park brake on it as the park brake was on the rear wheels
Last edited by 69Cuda; 04/19/2017 12:09 AM.
