I have an old (10 yr) catolog from Fed-Mogal. It doesn't list the cfm of the carb, but it does say when they were used. Yours lists an amazing spread of years, and engines. Along with a host of other carbs on the same list. 2642, 2650, 2744, 2773, 2787, 2805, 4200, 4430, 4431, 4432, 4619, 4620, 4621,
4742, 4745, 4746, 4969, 4970, 4971, are the carbs grouped together.
1958-1971, on 273, 318, 360, 361, 383, 413, 426, Inc.H/Perf.
Ok, thats how I feel now.
Float kit, 21p-188, Kit, 902-151C