Excaliper Ernie Tony S cobra ran weber carbs and set some records. I also have pictures of the 390 liteweight"turd" car running webers.
Application has alot to do with running carbs or webers. Some of it was just plain a money issue. Look at a carb, say Holley because it's a simple carb. The kit we carried was a jet box with 10 jets higher and lower that what was in the car, 4 gaskets for the float bowls, 2 base gaskets, 2 accelerator fuel pumps and arms for switch between 35 and 50cc. It all fit in a tackle box for fishing. Look at webers, you have 4 carbs, multiply that my 4. Jets , jet holders, tubes, bore reducers. You have about $500.00 alone in this box, and the box is alot bigger too. Today we have recorders for every race we run, back then test and tune with luck. Today A/F meters for checking A/F during the run or race. EGT monitors for exhaust temps. internal pressure readings for blowby inside the motor, Back pressure in the exhaust, and the list goes on.
The other thing IMO is that a Weber or Olberg motor is not built the same as a carb motor. Different camshaft, high compression than a carb, less timing needed. Can also run on low octane gas without knocking or pre ignition problems. They are great carbs, the price is also great too. If you have the money and time, DO IT. IMO I stay with the simple, less moving parts way.
Rick L.