273 Commando Air Cleaners and Valve Covers

So, the filter element for the HP 273 should be the same as a slant six then, assuming the lid is the same? The listings i found for slant six application show it as being 8" O.D., 6.47" I.D. 3.00" tall. Do these dimensions sound right? Oh, and only flowing 90 CFM... that for sure is no good for any performance engine!

Anybody recall what filter part # to use for a 273HP air filter?