I’ve had a few custom dual exhaust made here in my town. I just ordered a TTI x pipe for my 67 b body. Hands down it did cost more but the TTI is way nicer and fits near perfect.
I’m going with Doug’s headers to TTI 2.5 with an X pipe with Borla Xs mufflers. On a blueprint iron head 408 stroker on my 67 B body. Hopefully be running and driving here by summertime.
On my 65 Dart 273 10.5 LD4B I went with 2” from 273 manifolds back. Took it to an exhaust shop had it made. Had to modify tranny crossmember mount, easy mod.
It has the stock 66 high compression cam that was sent out to Oregon cam grinders. On my rebuild sheet I got from my friend just says RV lol. .030 rebuild.
I’m running dual 2 inch all the way back from manifolds on my 65 dart 273. I fabbed the crossmember up to make it work pretty easy. I think 400$ is reasonable