I have them welded into the collectors. I have EFI and run a wide band sensor all the time.
I've been using an LM-1 from Innovate Motorsports
Innovate Motorsports Wideband Air/Fuel Ratio Tuning It's a little old, purchased around 2005'ish. But still works great, and integrates easily with my EFI for closed loop operation. Right now it's velcro'ed under the dash. I will probably install a LC-1 this summer; maybe.
The LM-1 can also receive input from a variety of sources, like RPM, manifold vacuum, TPS, etc. And it can data log, with a fairly easy download to a computer. I know you have a carb, but it's not that difficult to set up sensors for monitoring. If you do it that way, it doesn't take long to dial in your mixture in a variety of driving conditions. And if you change something - like the cam - it's easy to make adjustments without going to the dyno.