I have a universal carb from mikesCarbParts.
I have not had any issue. Except user error when I installed and made a big vacuum leak.
I originally got it because I was chasing power and other issues. Which, embarrassingly, I think was because my split exhaust was keeping the carb from going past 3/8 throttle… which I noticed after I put the universal in.
Also my engines were using a large oil filter, that bolted to intake and was always in my way and difficult to remove etc etc. all just excuses. I will probably put one of my Rochester back in some day… maybe.
No scientific data from me though.
