very interesting,after looking on this site found some info.so a fully closed deck means the cylinders will not move around very much,and an open deck means the cylinders can move around a lot,especially under higher than stock boost levels resulting in head gasket failure as the cylinder will wear away the gasket in time.so a semi closed deck should be in between,i.e can handle a little more boost?

 

Yep - that's about it

 

ok just to anounce that today i got a fax from scooby teknix stating that the engine had a sti shortblock fitted to my car last april,well chuffed,the car now has a full history.so only thing now is that i am thinking how much extra power could the sti version 7 block with stock wrx heads and turbo with stock exhaust and aftermarket backbox take safely?the car is quick anyway,but another 40hp will put the cherry on the cake,do you think a remapp is the only obvious way to go? only its not cheap.