Help me plan my 64-66?

[picklito]

Sorry, no pics yet cuz I don't have the truck yet!

With the '70 Big Block Dirt Bike Hauler (BBDBH) comfortably on the road as a mostly mechanical/non-cosmetic daily driver... I'm starting to watch the ads for a nice 64-66 short fleetside. This will be a new truck series for me...

I'm gonna need a lot of help. Please.

ALL the 60-66 are nice, but I LOVE that forward A-pillar and symmetric door window of the 64-66. It will be a frame-up, "tastefully upgraded original." Not going to worry about original nuts and bolts and date codes, but I want it to be a solidly 60's-style hot rod. First thoughts, since I can do this part easily:

350-383 one piece rear, roller cam, serpentine belt.
aftermarket EFI
200-4R trans
PS, power discs, static drop

I have found some 16"x5" 6-lug steelies that I'm itching to run with a narrow white wall tire.

Oddly, my biggest unknown is how to do the A/C? In this series of truck, am I looking for an A/C cab, or will any cab convert easily? Or, am I simply better off going with an entire aftermarket A/C system in a 64-66? I can do my own A/C work if that matters.

Let's just start with that. Thanks in advance.