Nope, that will not work, cowl and regular are different diameters. I assume this is for your L65 car, the best you can do (If you cannot find an original) is to find a period correct auto 4bbl cleaner (much more common on any chevy 69 and 70) and graft a 4 speed snorkel from a used/junk repro cowl cleaner.
I think I may have a correct auto cleaner if you want to PM me.