That is the old "Street Hemi" grind. Supposedely the last step for a street car. I ran a 284 duration solid cam in my 273 Barracuda, but it was a 4 speed car. I liked it but we are all different in what we like and can put up with. The 273 ran best with a 268 duration cam, but that was also with better heads, intake and carb. It also shows how easy to fall for design creep. How much can you get the cam for?