What A/F Gauge do you run

did you install the bungs in the header themselves? I have TTi's and would rather go just after the header if possible.

If you have nice headers I would weld in a bung after the collector flange. On my Turbo motor I made the downpipes so YES I added the bungs on each side 18" away from the turbo exhaust out.

67cuda360 Thanks mad dart.
I'm running stock manifolds on my 360. Would it be safe to weld it right where the downpipes come down and start to go horizontal along the bottom of the car (so around the front of the transmission)?

Since I'm only installing one bung, is one side of the exhaust better (passenger vs. driver side) then the other. I'm running a H pipe dual exhaust 2.25 inch

Somewhere after the manifold flange on either side of the engine is fine. I would pick the easiest one to get at. If you want you can weld one on each side and move it around for tuning. Not necessary but it is an added feature.