Here are some picts of my 70 340 Cuda with TTI's. I would say comparing the picts between TTI's and Doug's I would save the $200 bucks and go with Doug's.

Also my exhaust is 3" from headers back.

4666820-PICT0040.JPG (237 downloads)

70 Cuda 340 4 speed - now stroked to 416ci (SOLD)
2017 Mustang Shelby GT350