I removed the dual carb setup and rebuilt the fuel pump on my 1962........Merc 450 outboard motor.
Two carbs on the 261 in my '48 Chev would be great but I don't think these Tillotsons would do the job.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.