Cams for 318's

Wyrmrider said
.480 lift cam is hardly a broomstick

ir3333 said
comp XE 268 .477 .480 .224 .230 is way too much for a 318.
go to comps website and get their dyno sheets.You'll see the xe 256 and 262 are better than the xe268 in a warm 350 sbc with Dart heads.
.410 .420 or .429 .444 and maybe .204 .214 would be a good choice for a stock 318, but you didn't want to hear that.

This isn‘t exactly true.
What is missed is the fact that duration does two things. It controls the operational rpm range and how long the valves are open to ingest air and fuel.

IF the supporting cast of parts are not employed to make an effective full use of the extra air & fuel, less power can be the result.

A larger duration cam will have a higher operating RPM range as the plus in making more power but has the draw back or not making any decent power in the lower operating RPM range. The larger the duration the more power you can possibly make at a higher RPM at the cost or lower RPM power.

Dave Freiburger said, and I so whole heartily agree, afford the best cylinder head you can.

There is NO magic cam for any engine of any displacement. PERIOD!