I am looking into buying some used alcans for my 2000 tacoma. The guy I would be buying them from had them custom made for his 2004 tacoma. Its a custom 7 leaf pack built for 300 extra lbs. in the back and 2.5 inches of lift. I have a camper and some extra gear so I think the weight range is approximately correct. Anything else I should look into as problematic in trying to use this custom leaf pack on my truck? Also, am I correct in thinking that I can re-use my stock shackles with the alcans? Thanks