Rebuilding a 65 273..I need some help.

What about the original 340 4 barrel cam with this combination? It got slightly more duration and lift than the original 273 Commando cam. Any thoughts? 65'
Slightly? The 340-4 cam was pretty radical in a 340. It would be a monster in a 273. You better have a 4 speed and a good clutch. You could use that cam. I wouldn't.