hi luca , ians cousin worked for cosworth and when they finished the wrc program he got a lorry load of parts for a grand , 8 wrc blocks , 12 inlets , wrc wastegates etc . i was going to buy one but when looking at the block he said that there was that much machining and custom parts to fit and build he simply said it aint worth the hassle. like dan said just liner your standard block. my engine made 522bhp @30 psi in 2006 and theres only paul johnson who has bettered that with the same amount of boost and that was only a few months ago. iam sure you realise there are more mods and parts that have advanced in the last 4 years. 600+ bhp is acheivable more easily with the new parts available

cheers paul