not with the stock tranny, you should be fine clearance wise with a small block. take note of the fan location in regards' to the radiator and the lower radiator hoses.
Make sure your oil filter clears. Some are longer than others. I don't know if 1964 still had the long can with removable filter. For years there were adapters allowing a screw-in filter on the early engines. If you have one on the engine already, good. If not, get one.
Thanks for the great info. I think I want to use one of the el cheapo aluminum radiators from ebay and save the 33. I wonder if the 3 core china one is any thinner than the original and therefore give me a little more fan room? Looks like that could be tight. Also I`ll just use the original alt and modify the existing wiring/regulator/add resistor like in the ol days. With that, what location for the top hose seems to work best? The radiators are supplied left right and dead center. Thanks
For the upper hose at the radiator on a small block should be on the driver side most times. Either will work. Dont cheap out on the radiator. The stock one will work fine and look the best.
If the stock radiator is in good shape, just plug off one of the inlets and outlets and see if it stays cools. My dad has been running his 40 like that for years. Sent from my iPhone using The H.A.M.B. mobile app
Your distributor probably won't clear the firewall. May need only a half-inch. Back in the 1950s Hot Rod Magazine covered putting a small block Chev into a 34 sedan using original drive train. Fussy customer didn't want firewall modified. Shop moved whole drivetrain forward about a half-inch. Fabricated crooked shackle links for rear. Crazy. So use small distributor (not HEI) and cut or hammer your firewall as needed.
He is right about the distributor, but you can gain a little bit of clearance using an early mallory YC or YL series distributor. The are about 3/4 inch smaller across the cap.
Not same radiator.... but for a 32, all the repros on ebay (32) are thicker than stock 32, and that means the lower tank flanged area also gets shoved back, where the fan will clip that part of the radiator. (So it's not just the main core thickness that matters).