A reasonably big difference there. Is it 300 or 350 as a minimum?
Well it is going to depend on exactly how much power is actually "needed".
Depending on the quality of the tune, usage and ultimate power level you can get away with a stock engine however for how long?!?! Maybe 6mths maybe 10 years.
Not a forced induction question. Personally do not want 18" rims and 350rwkw.
ummm ok.
A search (as suggested) would answer all these questions. Once you have a roughed out plan and post this up you might find a warmer response.