[RUSHNBOBO]

I do believe the 3/4 and 1/2 ton 2wd uses same spring dimensions 2 1/4 inch by 52 inch (off center spring through bolt) Note; the 1 ton 2wd 67-72 uses a 2 1/2 inch wide spring by 52 (centered through bolt) same as most 73-87 1/2 and 3/4 ton trucks. 4x4 also uses i believe the 2 1/2 inch centered spring.

As to answer your question of will i be able to haul? most lowered springs are considered "sport use" and therefore will not have the same load capacity ...their are options when it comes to hauling though...one of the easiest and best is a air over leaf kit which gives the best of both worlds...rides smooth when unloaded ...then just air-up for hauling; many companies offer add on leaf type overloads which are usually mounted over the main spring ...u will have to check compatibility with lowered springs though ...hope this helps BTW...I use a air over leaf kit on my truck and they work great!!!!