Jerry & Jon,

What is your opinion of the Holley AA1 ("94", 2100, etc) 2-barrel carburetor used by GMC on the 302 (and used on several other vehicles/engines)?
https://carbkitsource.com/carbs/tech/Holley/2100-index.html

It is two-barrel; and adjustable jets are readily available.

For us regular rubes, can the adjustable jets make it suitable for a GMC 270 or Chevrolet 261?

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.