A few years ago I did a low deck 511 for the FAST class. Not a high tech "high level" build, but not entry level either.
Ported 906's(way more $$ than RPM heads), roller cam, HS rockers, reworked stock intake, etc......... That motor was about $11k, dyno tested and ready to install. It would probably cost about $1500-2000 more today.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
