head job

Better check with an engine shop and see how much those amounts will change your compression ratio. You have to look at where you want the ratio, and if that amount of removal would require changing pistons. Check the racing machine shop pages, they may have a quick and dirty calculator for compression ratio changes. Also check your valve clearance, I don't think you have an interference fit engine, but that might change with the machining. As I said in the prior post you may want to go to the Turbo exhaust valves, if you don't have them already. Has anyone else taken that much material off the head? And did they have to remove a link from the timing chain? Questions that should be answered before you make the cuts over .020". If this is your racing engine, valve float might be a consideration also-may require different valve springs. Again, the clearance issue. No sense in all that work just to have a piston punch through at speed. Sounds interesting- keep us updated.