ausumtim, The stock 3 speed transmission would be what is commonly known as a Muncie SM318, non syncro first gear, 4 bolt side cover, they came with either a long or short tail housing. Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes 1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes 2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans 1947 Willys CJ2A w/F-Head engine