Nice spec....and 500bhp is the limit on that comp ratio providing you got a good mapper....will drive lovely and make good torque..BUT bare in mind longevity will be the issue as a .5 200 block aint gonna last long with the forces created with that comp ratio...you NEED liners at a bare minimum as these are stronger than the original block or preferbly the proper nikasil block.......my engine is 7.9-1 running liners on the eec4 block long studded WRC gasket etc...aiming for 600bhp on a GT35.