You will need a V-8 bellhousing specific to a 60-62 truck because of the hydraulic clutch system. V-8 bellhousings from other years with the fork on the left side will not work. Nothing from the 235 engine will change over to the V-8. You will also need a V-8 flywheel, throttle linkage, exhaust system, hoses, pulleys, etc. As 3B stated the front mount is also specific to those years. There may be an aftermarket conversion kit available.
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