Advancing/ Retarding Camshaft

I've heard it said "if you have to advance your cam timing it's too small / if you have to retard it, it's too large" that said I had a Aussie GM 308 with a mid sized cam set to 6 degrees advance with a blue printed Quadrajet and good headers. Overall top end didn't change that much but mid range was great. A lot of guy's that were into all out top end were shocked by the real world power of this basic engine. Many thought it had 150 + more HP than it did just because of the power it made at 4,500 - 5,000 RPM. An open road trip saw guy's with 400 + HP 327/350 Chev's and 3.55:1 gears complaining I was driving too fast! You just need everything to work well together to make realworld usable power.

Marty