I would think you have to be careful to not take off too much when milling the head. You dont want the valves hitting the piston
More compression always means more power, Im not sure why your engine doesnt run stronger.


-Ken V. 1998.5 SE Praire Tan Zetec ATX psycho_bass@hotmail.com Roush springs Roush rear sway bar BAT struts 17" Millie Miglia HT3 and a ton of subtle asthetic mods