I like your plans!!!
I'm not one that cares much for cutting the frame and all the lowering stuff, to each their own, it's still a free country!
The 72 is the pinnacle of the 67-72 pickups. Nicer interior stuff, disc brakes, 350 engine was in most...
The carb will need work,
www.cliffshighperformance.com is the place to get carb kit and parts. His deluxe kit is $79.95, sounds pricey but includes parts NO ONE else puts in kits! Plus his parts are ethanol compatible, I don't know of anyone else's that is! Cliff can send you the EXACT parts to tailor your carb specifically to your specific use, especially with todays modern gasoline formulation. He can build your carb if need be, of course that's more $$$.
Fix the rust and other details, and DRIVE IT!
Waiting more work!