the reason he said to stick with the Kadron is that (in his opinion) the Webers were crap.
:o
Um, if you get the EMPI copies, yeah, I could see that. There's a reason why our club jokes that EMPI stands for "Every Mistake Passes Inspection". ;D
After a certain point, though, Kadrons just do not give you the carburation you need for big engines, and that dividing line is right around the 1915cc to 2054cc range. Below that, I
haven't bothered with Webers - I've run Kadrons on my 1600s (actually 1584cc) and 1641s, and had planned on 'em for my 1776cc.
But, Kadrons on, say, a 2165cc or 2332cc or, Cthulhu forbid, my buddy's modded-all-to-hell 2733cc Type 4 motor? Yeah, that would be like the shop here in town (that will remain nameless) that built a 1915cc Type 1 motor for someone else's '66 Bug, then threw a 30/31 PICT carburator on it. She couldn't understand why, within 12 miles of freeway driving, her oil temperature was up around 240 degrees.
The big mistake I've seen in SoCal is that people throw Weber 48 IDFs on their cars, and can't figure out why they run so crappy for street driving, and can't idle worth a damn. I've seen people trying to run them (or even 44 IDFs) on 1600s, and have to wonder what the heck they're thinking. That 2733cc in my friend's Porsche 550 replica? Yeah, he's running 44 IDFs, because anything larger, on a 2.7 liter motor, and he wouldn't be able to drive it on the street.
Webers are great, assuming they're built right, you know how to adjust them (I
don't, which is one of the reasons I've stuck with Kadrons), and you're not overcarburating. Porting out your heads and running larger valves are usually helpful with them, too. I've seen plenty of Weber setups done wrong, and can see why people would think they're crap. But, I've also seen plenty of them done right.