67 chevy cab to GMC ?'s

[1969K10]

So, I've got this 67 chevy cab sitting around. I need to work on the cab on my truck (rockers & corners). I've always wanted a GMC for the front grill look (4-lights!!). My thoughts are to get a GMC radiator support and swap it in, and do the work to the 67 cab, and then just swap cabs some weekend.
1) From what I understand, everything is a bolt-on operation. The fenders should fit and all, correct?
2) Wiring for the lights. I'm going to guess here that where I'm used to 3-prong connectors for the head lights, the GMC will have 2 sets of 2-prong connectors on each side?
3) Anything else I need to know or be aware of before starting this project?