Questions from the new guy

[TXBowTie]

Hey guys. I just bought a '75 long bed C10, 2WD, Silverado and discovered this site while trying to figure out how best to approach my new project

I have found some pretty good info here, but would like to ask a few questions:

My truck doesn't have a sway bar. If I find a factory sway bar setup from a different 73-87, it will bolt right onto my '75, right?

My back bumper is pretty bent up, and has welded-on custom brackets. I think I have learned that any 73-87 fleetside bumper (with matching factory brackets) will bolt right on (but only early ones will match my front bumper), is this correct?

My Truck was originally a 454 (per the VIN), but now it has a 350. I noticed it has a TH400, and an over-sized radiator top bracket/ fan shroud. Are there other things "special" that I will run into when ordering parts, because this truck was originally a 454?

My two-tank bed is pretty beat up, if I swap it to a fleetside long bed from an 81-87 (with the square filler-cap doors) will it bolt right on? Will the body lines match? Are the only parts I need the bed, tailgate, and fuel tank filler tubs?

Thanks so much for your help guys, hopefully I will now enough to answer questions myself here in the future...

Wayne