speak to crazycage on here and get one of his modified sx200 ones, then stick a decent turbo on there, gt28 would be good, although a t34 would do the job.
i have a blacktop zetec turbo setup, forged rods and pistons cr is 8.2:1 IIRC, area six head, cams, springs etc. modified sx200 exhaust manifold, t04b super v trim ball bearing turbo 0.63 housing, good for 450-500 bhp with the right setup.
inlet i used was an rs1800 alloy one, with siemens top feed injectors fittted with modified fuel rail etc.
exhaust is a twin silencer 3" system from turbo back with external wastegate on gizzmo boost controller.
i reckon once i get the clutch sorted i'll be easily pushing 400bhp.
on megasquirt 2 v3.0.