Are you looking for a side cover or just the gasket? As far as I know the side cover gasket only comes as part of a gasket set.
The side cover gasket is actually the same from 48 through 67 on Muncie transmissions. It would probably be easier to buy some gasket material and make one.
Fred


Last edited by rfs56trk; 08/11/2016 10:25 PM.
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