Rep Power: 640

I am going to be diving into a GSR build up and I wanted to know in more detail what Milling the head and block would do? I want to Extrude Hone my head and get a 3 angle valve job however I do not know what to mill my head and block at. Planning to change out the Cams, want nothing to crazy just a nice milling job to make me happy. Would 0.10'' be a good milled head number? and if it is what would the head need to be milled at or can it be left stock? Thanks.

 
Rep Power: 748

depends, is your head warped? usually you dont need to mill it unless its warped or unless you wanna bump the compression a little. it all depends how much clearance you have between the piston and valve as to how much you can mill. if youre not sure then get a shop to build the engine for you