Some years ago, Brother Lon and I did a job on his '67 Mustang. The car had a TP in it, an installation we did when the car was less than a year old. At that time we used the upper end from one of the LeMans GT cars---got it from Triple E---and a short block from the local Dealer.
Some years later I got Jim Dove to make up a set of TP heads using his 'Type II' exhaust port design. The exhaust ports were raised, spread, and re-shaped. In order to not compromise the header design---this required custom headers---we decided to completely remove the shock towers, We wanted to have a minimum of 6 inches before any header primary made any sort of turn. We solved the shock tower question by using a plasma cutter to remove the entire tower sheet metal.
This made it obvious that the upper arm inner attachment points were also in the way. We sourced a set of shorter-length tubular upper arms from a 'Late Model' circle track supplier (they cost about $25-or-so apiece) and used coil-over shocks out in the wheel-well. We filled in the holes where the towers had been with stainless plate (for strength) properly braced, and mounted the upper ends of the shocks to fabricated pivot points. The inner attachment points for the upper arms were moved down and out, making use of the proper geometry developed by Shelby for the GT350 and 500 cars. Handling was much improved and significant weight taken off the front suspension.
In order to have completely unimpeded room for the headers, it was also necessary to re-do the steering, making use of a Borgeson universal instead of the factory rag joint.
The car is now in New Zealand.
KS