M8 do some research before bowling along,our 2.3 put out 525ftlbs@2300rpm and needs a grands worth of clutch behind it.
400/400 is obtainable without going to 2.3 plus staying 2.0L keeps it revv'y
wrsracing can supply you the rods/pistons to forge the motor plus things like head gaskets,arp bolts etc etc
injectors 750cc are nice but 560cc out of a latter evo will suffice(just)
Turbo choice go for a wrsracing tdo5 hybrid that bolts straight up and can produce 450hp then you have some in reserve
mappable ecu stuff you will find on my site
www.4g63.co.uk for the cheapest/best option