The A radiator is smaller than the '32 so the "daylight" above or below (depending on how you mount it) could look odd. And the '32 hangs from brakets on the radiator so you'll need to solder on those in the right spot if you don't use a '32 style radiator. Yes, the hood contour is different around the top. Usually folks make, or have made, a new hood so that it conforms at both the cowl and shell. You'll have to do some trimming at the bottom, especially if you're running fenders and gravel shield.