This cam is not for you. Sorry my man. This is not a stock camshaft nor is it, “On the Brink” of being too much ch for a 273.
It is on the verge of being ridiculous to much unless you have some decent gear and a high stall converter behind it. Even though it has a listed power band of 2-5K, it’s the 273 is very small and makes a low amount of torque. Unless you have amped the engine up quite considerably, this cam will make the engine a total dog with out power way beyond the listed and early 2K power band starting point.
It seems like your looking for a stock or close as possible replacement cam for your 273. Look at duration @.050 numbers in and around 195 - 205 for a suitable replacement cam. A 4bbl. cam can go another day 6-8*’s @.050 & still work with a low gear set and stock converter. I would not personally go any higher in cam duration.
