“….If you advance your cam 3* it makes more low end to tow with……”

You may or may not show some improvement by picking an arbitrary number and advancing the cam and in some cases may even hurt performance.

The reason I say arbitrary is that unless you have actually degreed the cam to begin with (a step that most engine builders don’t do) you really have no idea where the cam is in relation to the advertised cam specs. Varying tolerances within in where the keyways are cut, quality of the gears and the cam itself can and often do make a difference in where the cam is actually timed when it’s really in a running engine.

20-30 years ago when the multiple keyway timing chain sets first came out I started using them with at 4 degrees advance with what was at that time my favorite SBC cam. The first couple of engines I did it on worked out great the last 2 ended up pinging, running hot and in general just not running very well until it went back in and set the cam back to 0 degrees. I found out later (after talking to the manufacture and going back and actually reading the cam cards) that the newer cams I had gotten had been ground with 4 degrees advance already cut into them.