318 to 360 swap Scamp

In summary, to swap a 318 2bbl with a 904 to a 360 4bbl and keep the existing 904, you'll need a 360 car pan, car 360 motor mounts, A 360 torque converter or aftermarket flex plate for a 360/904 combo, an A-body 340/360 LH exhaust manifold (or both sides if the 360 doesn't have a RH manifold) or a set of headers, and 4bbl kickdown linkage. If you change over to a 727 transmission, you'll still need the appropriate flex plate, a shorter driveshaft, and a few shift linkage parts (if it's a column shift) along with the 727 dust plate(s) and slip yoke. The transmission crossmember is the same.