Just chasing some rough info on what you would recommend for my old gc
specs are

207 block,
cosworth cams and springs
850cc injectors
unequal length headers
GD sti intercooler
butler exhaust

keen on a blouch turbo, wanting to make 350 ish mark at hubs
and want to keep lag at a minimum (i know you cant have the best of both worlds but as good as possible)