Hi all, new to this site, just wondering if anyone has done or in the process of doing HQ-WB chassis graft on 55-57 chev? if so any pointers? thanks for any help

Talk to an RTA certified engineer first. I believe someone mentioned that in NSW, frame grafts are not acceptable....so before spending time and money, best to check that out. It may well be legal to fit a HQ crossmember to your chassis.