Carburetor Recommendation
The early Holley 1 BBL was 1920 and used by many manufacturers. I'll say they suck because I went thru 3 rebuilt ones over 18 years in my 1969 Dart 225 with the car stumbling at idle and dying leaving stop lights, before the 4th one fixed the issue and it purred like a kitten. No mechanic could fix it, claiming "vacuum leak" and such. Apparently, the sealed metering blocks get clogged and rebuilders don't touch that, nor test the rebuilt carburetors. The side-mounted fuel bowls can leak, as can the rubber accel pump diaphragm. Later Holley 1 BBL were 1945, and much different. No experience. I have a Carter BBS on my 1964 Valiant 225. The engine is so smooth and quiet at idle I could barely tell it was running with hood open with traffic passing. The silenced air cleaner probably helps. The BBS is simple, and same design as the common BBD 2 BBL, and I think the common after-market Edelbrock 4 BBL. You can adjust richness w/ screws on the metering rod, or swap rods (haven't fiddled). Download a full manual pdf free online, for the BBS or BBD. With a Holley, you have to change jets.