Holley 1920 missing parts - time to swap?

Swapping over to a 2 barrel set up will cost way more than $250, unless you find an intact set up from a donor and do all the work rebuilding/restoring it yourself. The later 1945 is an option, from the later slant 6's. Parts are out there for the 1920's and they are easier to work on than the 1945's.