Suggestion I would build your future block for water/meth setup you'll be happier with it if this guna be a track car lowers intake temps etc and allows more higher compression to be used vs e85 but that 9:75 sounds like a little to much on iron heads with some boost. It can work but u need a bigger cam than the vs or xp wit a lot of duration to bleed off the cylinders.Aluminium heads with the xp cam would work with thermal coated pistons .