I struggled with headers on mine and was ready to load up and take my pile to Arizona but I found a local guy that did some header work. The headers I had made for a low deck big block a body which was a challenge especially made as I wanted. I absolutely did not want in chassis headers which limits any header builder especially with 2 1/8 stepped to 2 1/4 primary. I notched my firewall to give him clearance and came out awesome but a little long which he said run them and we can shorten them if it hurts the HP. So far I've gained 60 foot and lost 1 mph.