I would get...
RR Racing motor mount insert combo ($55)
Kartboy Shifter bushings ($25 to $35)
Some midpipe back exhaust with hi flow cat, resonator, and flex pipe, Vibrant makes one ($800)
DSM AFC ($325)
Greddy Profec Type S ($310) set to 8 psi
AEM Wideband ($270)
Autometer full pillar 3 gauge pod holder ($55)
Stewart Warner Boost Guage ($50)
Stewart Warner Voltage Gauge ($50)
CustomMSP SMIC ($485)
Cast Single Runner Intake Manifold ($199 or $250 with egr pipe)
Rocky Anthology (includes all five)