Local Coustom Muffler Shop
Warners Muffler in Oceanside, CA is where I went, when I done my P/S I/C Install. I done it with stainless Steal 3" Mandrel bent of course was the easiest way. I aso supervised it to make sure it was done right, and they did exactly what I wanted.
My old 86 TType was a 130,000 mile stock long block that went 11.50 @ 118 un-tuned with a TE45A, 72's, T/H DP, single shot 3", CA Art Carr 3600 stall. I do like the P/S I/C! Good luck and hope this helps ya out.
Ray