The 235 bell housing will not work on any V-8. If you wish to retain the hydraulic clutch you will need a V-8 bell housing from a 60-62 truck which used the hydraulic application. GM reverted back to manual clutch linkage in 63. I understand the hydraulic bell housings are scarce but someone on this site may have one. There are numerous aftermarket suppliers that offer engine mount cross members and kits. That would probably be cheaper & easier than finding other parts and having to modify them.
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