Well since no one has posted "you should be doing this", I guess you still have 11 more to go before you get to a dozen. If ground clearance is your largest concern, along with fitment, then you would be doing yourself a disservice if you at least didn't check out FPA. Stan's headers have the most clearance in the business. Worth a call and a look see.
1968 Fastback: 331 stroker, FTI cam, N351 Heads with a few upgrades, 4r70w w/3600 stall, 9" locker w/3.70 gears