Lets see your 273 engines hipo and any

The big 2 over shadowed with options the 273 and in general Chrysler. There was really only 2 options that could be ordered for the 273 - 2bbl and 4bbl (the D engine - far as I've read was not a option and was only available for a single year). Ford's 289 had 5 options that could be ordered - and add in a special 302 hp shelby would make 6. And GM's 283 had numerous options - dual quads to fuel injection and everything in-between. By contrast Ford's 302 did not have as many options (I know the Boss version is highly regarded but rare) and is considered a work engine with most being 2bbl.