Cams How do you choose one?

bullet 272 cam with only 454 lift?
here's what's on their .904 master list Bullet Cams Master List

HC273/330 273 220 137 .3300 .000 CTA
HC272/336 272 224 140 .3360 .000 CTA
.330 x 1.5 ==.495

$220 is a lot of money for a chevy cam
back to the drawing board Bullet
HC267/320 267 214 131 .3200 .000 CTA .480 lift 5 degrees less duration but fatter
HC260/296 260 212 126 .2960 .000 CTA .444 lift 12 degrees less seat duration than the quoted 272 cam and about the same lift
would work without guide work and have a much better DCR- what say you DC guys?
Without going back over the thread
what did the mechanical compression come out to be
and this is stock ports and 340 HP exhaust manifolds- or am I confusing my builds?