Phil. i just fitted a gt30r to my rs500 integrale wastegate. i made 400bhp to the wheels on 29psi that was spiked then boost tapered off to 24psi. next run i will be hitting 36psi!!!

on pump fuel
THAT was just replacing the standard t4 and fitting the turbo.
im waiting for my dyno tuner to get a program to re tune my webber pectal board ecu. i will let you know the result.
Good choice in turbo for a standard engine!!!! you will still have lag.. probably the same sort of lag a standard t03 engine gives!! which isnt bad considering the final power output!
Good luck with it! hopefully you can get the power desired easily!