The water pump and fan original to that engine will work just fine. The water pump adaptor plates we often talk about, are for ‘55 1st series and older 3100’s replacing the 216 with a 235.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum