Well I hate to tell you the bad news but it takes alot of money to hot rod a psd.
Here's my recipe:
Intake- $50 DIY
Exhaust- 4" SS $450 IIRC
WW-$70
Custom chip-$450
ATS housing-$425
SB ConOFE clutch-$900 IIRC
In/tank pre-pump mods0- $35
HX hose-$40
BPRV- $30
FP reg- $60 IIRC
Gauges- $400(including outside FP gauge)
CCV mod- $15
PRE pump fuel filter- $200
On board diagnostics to let your tuner know what's going on- $400
This has yielded me just over 300 HP at the rear wheels.
To do list...to get to at least 360hp
Fuel system- $425
Stealth HPOP- $2000 usually
van turbo- $900
If I didn't have PMR's injectors would cost around $3000 for custom stage IIIs that I would want. Then I would need fire-rings, bigger turbo, studs.
You can do your own math.