Sorry but more questions, I like to understand the reasoning behind certain things unfortunately before committing the cash. Anyway got a few more questions regarding a YB build that will go to 5/600 bhp depending on the answers.

Best Bore and Stroke combination - also what is the maximum piston speed and at what rpm ?
Recommended suppliers/manufacturers of crank,rods & pistons
Why nikisil steel liners - why not run with bare liners ?
Maximum boost and why and at what rpm?
Suggested Cam profiles - what duration ? Lift ? Solid or Hydraulic?
Suggested Valve Spring pressure's - installed and full lift ?
Oil pump flow rate increase for the higher horsepower - if necessary and modifications required for wrc spray jets (what effect does fitting these have on oil flows/pressure?
Other than dry sump any other means of driving the oil pump in view of removing the distributor.
Suggested flywheel weight and clutch type for this range of power?

Lots of questions I know but I guess there isn't one correct answer