When i decide to put a new engine in, I was wondering ... probably wouldn't be keen to put a bigger turbo, as i like the VF34 being really streetable.

So, I was thinking a crate 207, perhaps with cams, reconned heads, 1000cc injectors, STI TMIC with waterspray (already have), or FMIC if required, then boost up the VF34 to say 26-28pound, add a P20 housing (maybe), but keen to keep the P18 to bring it on boost sooner, get a tune and then winning?

Where are the sensible limits of the 34? She's tip top at 21psi right now, has been for ages.

The 207 should be alright at that boost level with regular services and maintenance?

Sound like it would give me 300horsies and 400+nm of torque at that boost level?

Would it be wise/should i require the P20 for better flow?
Reconned heads flow alright at higher boost levels?
For said boost, fuel system? Parallel rails, what fuel pump? Running a Walbro currently.