This has been covered in depth.
You will lose performance going to atmo bovs.
Keep the stock.
Theyre good for up to and over 1000hp from the cars that have been on here.
someone had a BRAND NEW genuine holden/nissan vl mootor for sale in fs section.
think it was around 2-3k.
might be the go.
dont need crank done.
dont need bearings.
just change for your pistons, and swap rod bolts to arp.
hey mate just saw an add for a very similar specd hp at harvey norman.
newer/faster i7, 750gb hd, 8gb ram, windows 8, just doesnt have blu ray, for $792.
just a heads up.
glws.