Would like input on why my boost pressure is so much higher than estimated by this worksheet.

Made the following mods to stock '02 HD, 58K miles:

Replaced cat back with Magnaflow
R&R Supercharger - cleaned intercooler, replaced gaskets, TTY bolts, closed off lower PCV
Replaced stock plugs with NGKTR6 gapped to 0.32"
Replaced stock LP with Metco 9.5" (8lb)
Replaced stock TB with single blade SCT
Replaced stock CAI with JLP
Added Mafia to MAF
Added oil separator
Pro Dyno Tune yielding 433.2 RWHP and 569.3 ft lbs of torque

Tuner said the engine is making a lot of boost - it pegs my Autotune gauge just above 3K (15lbs) and tuner said it is making 19lbs above 5K. That seems high when compared to the calculator referenced above, which says I should be seeing 12.5lbs.

Tuner said my cats got a little stinky as he was tuning - thinks maybe I would benefit from a freer flowing exhaust system, but doesn't think my boost pressure would drop.
Is maybe the combo of JLP CAI and SCT TB reducing the inlet tract pressure drop? If I lower this value in the worksheet to 0.5psi from 1psi the calculated boost goes up to 15.
I would question the gauge except the tuner put his own gauge on and it matched.



Other thoughts? Crankcase ventilation imminent, or safe to play (I'll keep it below 5K)?