Back halfing, and 4 links.
 

On my Plan D truck originally I wanted to keep the suspension on springs. Well I think I decided I want to change it, and actually just bag it now.

Originally I Z'd the rear of the frame 3 inches as it was supposed to be static, and I wanted the original bed floor.

Well now I want a wood floor, and a 4 link. So back halfing seems like a better option now. For logistical mounting reasons.

What size box tube is ideal for a back half? I was thinking 2x3 with 1/8th wall. The frame on this truck is thinner then my C10.

Also who makes a good 4 link these days. I used Thoerbeke bros in the past on a friend's truck.

Also how short is too short. I can't remember how long I could squeeze in there if I wanted. But my reasoning is atleast 24 inches.

While the plan D is a 3/4 ton truck, and has a 10,000 tow rating. It mostly will be a cruiser. What thickness of bars are good? I see 1, 1.25, 1.5, and monster 2 inch. I know 2 inch is too big, but what is to small?