The 216 carburetor will not mount or work properly on the 235 engine. The mounting holes are different; 2 11/16 inches center to center on the 216 vs 2 15/16 center to center on the 235. Throttle bore and venturi are also smaller on the 216, which would negatively affect performance. You will have to use the Rochester that was designed for the 235 engine.
As for clutch and pressure plate, the same size (the one you have) will fit both engines.
