This 1959/1959/60 261 has been running reliably with two 235 carburetors for over two decades.

It has "off-the-shelf" dress-up and intake/carburetor parts.

The 1960 261 in my Suburban has a single 2-barrel GMC AA1 carburetor with adjustable jets.
It has very nice power/acceleration (at all speeds) and good gas mileage (except when I cruise between 65-75 mph).

I am proud to be a "shade tree" mechanic.