The Stromberg you have would not work as well as either the Carter or the Zenith on your application.

G.M.C. used a LOT of different Zenith carburetors of different sizes on their 270. The one you have is one of the most common small ones used.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop