When you step up to W7, W8, W9 heads you step into a whole new arena. An aftermarket block is a necessary must have and then to get the most out of them Chinese rods and cranks should be left on the shelf for American made expensive parts. Belt drives and vacuum pumps along with expensive intake manifolds. That’s a few of the things that’s should be used with the expensive pistons you will need with lightened pins for the higher rpm that you will need. Then we get into car certs and upgraded clothes for the ET’s. I’ve seen so many guys spend their 30,000.00 for these upgrades then less that a year later stuff is for sale at discount prices. Good luck.