it would be if it had a stage3 t3 mate but power aint everything with an rst a good strong and punchy 220bhp on a stage2 t3 wont be far off a laggy stage3 anyway...

plus it sounds like a reliable set up but to be 250bhp it would need 23/25psi on that turbo....

you might find it easier like i did to sell in bits..

bottom end
head
management
turbo
and all the little bits

its just you normaly wont find someone to buy the lot so would be easier to break it... and you should get what your looking for mate