66 Valiant with 340
Tti headers with 2.5" X-pipe. Fits awesome. I have a TKO-500 so I had to clearance the Keisler crossmember a little extra. The setup clears the Lakewood scattershield as well.
The tranny crossmember modification would be really easy for you after seeing some of your work.
You also have to re-route the e-brake cable.
Dave