72 gmc 4x4 rebuild..parts?

[shoooter]

Hey guys, well the time has come to rebuild my 72 gmc 4x4 shortbox stepside. as of right now it has 39"tires and 7-9" lift, custom front and rear bumpers nut want to go back to stock, my plan is to lower it back down and run 35-36s, who makes the best riding lift? also looking for parts where do you guys buy them all, new grill ect. should i re chrome mine? what site to buy parts do you use? right now i have older cadillac seats andi want to change them out to more of a bucket seat, what ones will fit? now all the fun starts so if you guys can point me in the right direction that would be great, heres how it sits now.... any suggestions?