Early A V8 Headers/Exhaust

I’ve installed both Tti( when they first came out for early a) and Doug’s. One with manual steering and one with power. Both are 66 valiants. The torsion bars are a ***** with TTIs unless they’ve improved them in the last 10 years. Had to use a clocked starter with TTIs. I have a Lakewood bellhousing and 5spd tremec with hydraulic clutch. Don’t remember having issues with z-bar.