My question is…? :
Will i get to 300bhp on the standard :
fuel pump?
Yes, but it might be prudent to do the 'wiring mod' to ensure it gets enough juice.
Yes, but on track it might be a different matter. Go with Magooagain's advice and uprate it as he's been on track before
standard turbo intake pipe?
Yes, but you might want to fit a Straight Induction Pipe (SIP). This goes in place of the original SMIC when you fit the front mount for a bit less pipework to get air through
Go with a T28 hybrid turbo. You can easily see 300bhp and keep or even gain better spool than standard.
If your stainless steel exhaust is standard or near standard bore, then you may want to increase that... If you can get a 3" turbo back then you're looking at an easy 10% extra power there alone.