My ingrediants for a cheap 275bhp RS turbo would be the following:
1.6 cvh with basic forged pistons and basic forged rods (not too dear)
std 1.6 crank with new bearings
CVH head with 3 angle valves seats and a full porting job
Newman cam with solid lifters and veriner pully
Std head gasket
Gotech
Dark green injectors
Front mount intercooler
GT series turbo for around 23psi
Paddle clutch
Rebuilt gearbox

S.