Sorry to revisit an old debate but...

So it seems, because I don't have a garage nor the money to just pay someone to do it (my knowledge is also still quite basic, even if I had the tools) I'm going to keep the slant. Since it needs to be pulled apart anyway I'm going to get a cam, mill the head, probably need to change valves too, get the carburetor, clutch fan, and other things on it, and have fun with it.

Will I need a bigger rad?