65 GMC Radiator Project

[Adriangz]

Good day all, I'm new to this forum and would appreciate some feedback.

I have a 65 GMC 1/2 ton which I just picked up. Stock motor is long gone, but it it did come with a 305 that appears to be out of an early 80s camaro or caprice. Stock radiator also long gone so I bought a rad off of a 62 V8 Chevy truck. Using the current set-up the new rad sits over 6 inches above the core support. Read some previous posts here and I figure I could relocate the lower cross-member to drop the rad about 3 inches. Apart from this I need the rad to drop in a bit between the edges of the frame. Otherwise I need cut about 3/4" off the frame - "c" notches basically on each side.

I thought that GMC and Chevy were pretty much the same apart from the motors and other smaller details.

Am I doing too much here?