Moving the radiator support sounds like a bad idea, but I'm not sure what you mean or what you did. Could you please provide some photos so that we can try to help out?

My '46 has a full S-10 frame with a 455 Buick and I didn't move the rad support, but I did change where the rad mounts. Mind you I don't know if yours is a Chevy or GMC. They had different rad supports.


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket