273 Rockers on a 360

If it's a stock to very mild camshaft and the adjusters are in good shape, just bolt them on and go. If you have a pretty healthy cam with increased strength valve springs, you'll want to modify the rocker accordingly.

Yup, it looks like you're going to need to clearance the rockers at the spring retainer area and you'll need to enlarge the pushrod holes in the heads as well. You should contact Mike at B3 racing.