2 barrel , 4 barrel, whose got the answer?

They are two totally different carbs. The mounting bolt patterns are completely different. Look at the pictures of the mounting gaskets.
Holley 2280: Standard Motor Products 1420B Carburetor Rebuild Kit, Holley, 2280, Kit | eBay
Holley 2300: LIST 7448 HI PERF HOLLEY CARBURETOR KIT 350 CFM MODEL 2300 2 BARREL ETHNOL TOL | eBay
The 2300 is basically a performance carb. It will not fit any stock Mopar intake manifold (except 6 pack). It comes in CFM sizes from 350 cfm to 650 cfm.
https://www.carburetor-parts.com/types-holley-2-barrel-carburetors