high pressure 235 vs (USA) 261 installed in a 1953 truck:
buoymaker gives good advice/response
please correct/amend the following list:
car 235s have hydraulic lifters
truck 235s have mechanical lifters
all USA 261s have mechanical lifters
you will be Pre-68 Dave's water pump relocator/adapter (and, most likely you original from motor-mount "plate")
depending on the year 235/261 the motor mounts will be different from the original-engine's
you should be able to use your radiator hose set-up on either
you would most likely have to do a little rerouting/bending of fuel lines on either
both will have larger exhaust/intake manifold ports compared to the 216
both will most likely need adapted/new fuel lines?
both can use your old clutch-housing/clutch-assembly/u-joint assembly and rear motor mounts