I've never seen any reversion issues. Didn't even know what that was honestly. Had to look it up just now. No fire or fuel out of the webers as far as I have seen. I have aluminum mesh screens on the top of the stacks and they are still nice and clean. No signs of anything unwanted. No popping, back firing, etc.
Got the webers and intake from Pierce Manifolds. Good prices. They asked for some details such as the rev range, displacement and cam specifications. They sent everything pre-assembled so that I wouldn't have to figure out the linkages or anything. They were late getting the plate for the underside of the intake manifold so the machine shop fab'd one instead. Had an issue with the linkage popping off but that was easy to fix with a couple fender washers.
The webers had a nasty flat spot 2500 to 2800 rpm's. Everything else was good. I tweaked and tuned the mixture and reset and tuned to try to fix it. Couldn't get it. Finally called Augie Delgado, who is a Weber wizard. He gave me larger idle jets and whola! Runs like a champ now. Very smooth.
I would be interested to see how the car would run with a more traditional set up, but I can't imagine that I'd ever swap out the Webers long term. Just too cool and too much fun.