Maybe you could call the cam from a 4.3 V6 a 3/4 cam.

That quote by Uncle Bob above is pretty concise. I general descriptions on the street, though, in flathead Ford engines, which were extremely smooth and quiet in stock form, a half race cam had an almost indiscernible "lope" to it, a 3/4 race was noticeable in its easy lope, and full race was definitely "lopey", often quite rough and requiring a significant amount of throttle "messing" to make it tractable in street slow speed use such as cruising the local hangouts.