I used Dougs B body headers on my 87. RB w/SRs. Had to do a little frame trimming beyond the trimming I did for the 2" CPPA/TTIs I used before. Areas that were trimmed I boxed/platted for strength. Probably wasn't needed but did it anyway since it was easy to get to with the motor out. My truck is lowered with Chisholm 2" control arms and weak springs lol, never had an issue with them hanging too low even with our major drops from the blacktop to a gravel shoulder.