380bhp, could push 400bhp if you ring the neck of the turbo
as said go bigger turbo for reliability
also why valve cut out with standard cams?
and is your 8-1 comp ratio before the pistons where machined for valve cut outs?
if so then your no longer on 8-1,
torque wont do 400 with the spec
best mod is bigger turbo, better inlet cam and decent live map
that should give you your 400bhp and near on your 400lb/ft
but as said, dont chase numbers, that set up will give a very fast road car(unless your ROD)