If you want A/C, get an S10 with A/C. Heater core and maby even the windshield wiper motors and arms would fit, with the correct size blades for the windshield of course. If the '33 had windshield wipers they would have been vacume operated, usally vacume is provided from the fuel pump but on some ( like my '51 ) the vacume is provided from the carb, just a little FYI. Watch trucks on Spike, there building a '34 International with a blown SBC, it's project is called the hairy hauler.