that would be an insane amount of fun, id use twin T51R-SPL - imagine the Jet sound on 2bar lol
my ideal RB, i'd go for
Custom 2.85L stroker with 86.5mm bore
Higher compression [the highest to safely run 2.4bar on VP import]
RRR block
dry sump oil system
racing spec water pump made to fit
T51R-kai or spl
10 or 11,000 rpm head/cams
direct port Nitrous to spool fast at low rpm, at W.O.T
titanium inlet manifold, intercooler, piping and exhaust etc
paddle shift sequential like the new R35GTR
the current best Motec ecu
Always run on VP import race fuel, switchable 99octane map when on long journeys.
everything i could change to carbon or titanium, i would.
£££,£££.££ !