bbchevy,
Thats a little different, as you need part throttle and off the corner tq, plus in circle track stuff, in many cases, the guy with the most power doesn't always win.
Sometimes porting doesn't show the gain the flow sheet sais it should, because in the case above, he doesn't want to change anything else. For example, he could put in a big 280 at .050 .800 lift roller, and it would pick up, but not like you "think" it should. Now, fully port those heads, put in a bigger valve, and hang on, that port job seems magical. take that same set of heads off, put them on a 230 at .050, .480 lift hyd. cam 383, replace a set of pocket ported Vortecs, and watch it turn into a total slug. Its application specific.
Frank