If I had 15k USD to burn I would do the following:
Nitto OIl Pump
Oil modifications, head drain/crank vent
Sex Spec Sump
Basic Forged Piston Rebuild Kit, usual crap, King bearings, ARP it's mum left/right/centre
Drop in cams, springs, retainer, etc.
V-Cam setup
Twin scroll manifold, modern twin twin scroll turbo
No gay twin turbos
Rest of the money on strippers, cocaine and a ticket to Tomorrowland 2020