I didnt know you are trying to install a Jeep radiator.
My point is they made 2 A-body radiators.One was a 19" and one was a 22" extra cooling A/C radiator.The 22" is a direct bolt in with out any trimming/motification of the car.
Sorry, yes, im using a jeep cherokee radiator becuase it matches the inlets/oulets on the 5.7 truck hemi. i think itll look more "factory" then a custom made radiator, and im going for a "what if Ma Mopar did this swap" kinda look in my enginebay. Also the rad opening on the 66 rad support i bought (22"opening) only needs a little trimming to make it look good.