The exhaust on the TPs referenced above were, for all practical purposes, duplicates of the MR lay-out. When I had Jim Dove make up the last pair we used in Brother Lon's Mustang, we used Jim's own design for the exhaust. The exhaust runners were raised, spread further apart, and reshaped. The entire exhaust part of the head was different to such a degree that they were not recognizable as FE.
We had to build completely custom headers to match. And, so as not to compromise the header design, we removed the spring towers completely and went to coil-overs out in the wheel wells. The mounts for the upper A-arms were lowered considerably and moved outboard. Tubular A-arms were much shorter. We also had to re-do the steering link.
KS
KS