273 rocker help
I agree with Walt; if they're cheap - then buy them. Just put them on the shelf for now if you choose not to use them. Some project will come up some day that you'll want them for...
I ran 273 rockers on a 340 with the old .572/296 Solid Purple Shaft back in the eighties. Never had a problem with them and I used to spin the piss out of that engine. Still have that exact set of rockers on the shelf today in fact...