Hey bb
that sounds like a sweet setup, i think u should keep going ahead with it and see what its like to drive before swapping over to whatever sized single.
Im not sure what turbo would be best for you but im looking for 300rwkw and hoping the GT3040 can pull it on 1bar on a 26/30 with about 8.3 cr
If i had the money id love to go a set of tomei cams and cp pistons(9.0 cr), spool rods, tomei oil pump, ati/ross balancer(7500rpm maybe )
Since i dont pay for labour i think ill go the stock rebuild of the rb30 with stock gtr cams, and oil pump and 7000rpm rev limit, and move onto the above line later...