I concur. My '52 GMC 228 came to me with a Carter YF. It ran well, but when I happened across the correct for the GMC Zenith 228 carb I bought it and replaced the Carter. Rebuilt the Zenith and spent hours tinkering with it, but could not get it to run as well as the YF. Put the YF back on have been a happy camper since.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.