Another thing to consider is that the V-8 is about 5" shorter than the 235 which creates a considerable space behind the radiator. I used a 350 long water pump, a 1" spacer and a clutch fan. That puts the fan relatively close to the radiator. You may also wish to use a fan shroud.
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