De-Lift or Not? 72 K20

[72-c20]

it's a 72 K20 with a 4" lift. (Blocks in rear). (see sig)
it has 33's on right now, but on 15x10 wheels.
I'm going to 16x7 wheels, and possibly 285/75R16 tires. tires should help highway driving with the 4.10 gears.

The end goal for the truck is to be a tow rig for my car trailer and wheeler, and some daily driving. I will eventually be adding AC to it as well.

the de-lift in back is "easy" enough, just remove the block and put regular U-bolts back on it.

the front I'm guessing I either need to get a set of original springs, or remove some from the existing lift pack, and put on a stock pitman arm.

it's got a nice heavy bumper in back, but I'm thinking of getting a chrome on to match the JY one I picked up, and having a decent frame receiver hitch put on it...

opinions? de-lift, or keep it. how to do the front.?
are 3/4 ton springs diff between 2wd and 4wd?
SPID lists Heavy Rear Spring as an option.

are front leafs diff between 1/2 ton and 3/4 ton?