Mark,
First: determine the year of your motor.
If it is a 1956 235, you will need a short-shaft water pump, or, relocate an earlier (1947-1952) 216/235 water pump using the relocation plate sold on eBay by Pre '68 Dave. This will have a pulley groove-width that will match the pulley widths on 1949 harmonic balancer and generator (you can use that harmonic balancer on your 235).
Any 1948-1955st 1/2 ton Chevrolet truck radiator will work.
