For a vehicle of that type, size,weight,-----you should also consider a take out package of a later model, more up to date tech --------
look at the alum LS PACKAGES FROM later gm stuff--they are lite, compact, and have HP and economy on fuel milage------you will need matching ECM and wiring harness from vehicle its out of but those lift out deals are quite popular these days ( especialy when they are going into something that would need considerable fab work anyway.