Ive got Hks 272's im mine and there awsome best thing i ever did...
Mods are
KKR480 with 30mm gate
HKS 272 cams with cam gears (some china brand but they still do the job)
stock computer running 10 - 12psi
walbro fuel pump
cams definetly made this setup cracks the gate at 4500rpm, same setup on my brothers car without cams 5200rpm so they make a big difference and keeps making power all the way to 7500 and past it... (but not game enough on standard internals)