From Jon's (carbking) website:
https://www.thecarburetorshop.com/Kamc2.htm
1972 6 cylinder 232 A/T Gremlin, Hornet Carter YF 6202S

Good for a 235 but too small for a 261.

The YF 6199S manual choke and 6200S automatic choke was used on a 258 in 1972.

Jon also posted these carburetors, which are used on the next generation engines, but could be suitable for 261.
https://www.stovebolt.com/ubbthreads/ubbthreads.php/ubb/showflat/Number/81523
These are not direct bolt-on and use. For example, some have throttles that open in when the throttle arm is lowered and some when raised.
Some have the vacuum for the distributor below the throttle valve and a few above.
Some are made for California emissions. Basically you have to go through each carburetor's attributes for optimum.

Another option is to look for Ford 240 and 300 YF's but the ones I have seen like the YF4499S has an aluminum throttle base which turn to aluminum oxide (sandpaper) and corrodes the throttle shaft.

There is an on-going discussion that the Holley 390 and Carter AFB 9400S (not Edelbrock or Weber) 4bbl. would be the limit for a 261 with modification.

Last edited by buoymaker; 03/23/2022 1:57 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."