My 2c, How much power and reliablity is very much related to the turbo size. dont go small with the turbo and use e85 only. The larger turbo will prevent high exhaust manifold pressure. This helps keep in cyl temps down and enables the use of cams with overlap. If fact a larger cam will help the bottom end almost as much as the top end it the the turbo is on the larger side. Especially on the track.

Get the timing and fueling right!

20 Psi will reliably give 150Kw+ atw if all the bolt ons are done right and tuned properly. If not, a forged bottom end wont even save you.