I had the Hooker 6114 headers on my 70 428CJ 4 speed Mach 1 with power steering. Like virtually any PS car, you have to use the PS cylinder drop bracket. The Hookers are only 1 3/4" tubes I believe. They hang down some, but not too badly, especially compared to all the larger size tube headers. From what I understand, the FPA TriYs are very good for ground clearance, but again, not as large a tube size. I have FPA headers on my 428 CJ powered 59 Ford, and very happy with the quality and fit.