im getting some head work done on my 2.3. it's geting milled, fully ported, going from a 1.735 intake valve to a 2 inch valve and a mild cam. now, i was told that the exaust valve does not need to be touched but i still know nothing about what's really going on. my pistons and rod's are cast aluminum and i need something alot stronger. my compresion is going to be higher and i need to know where to look for stronger piston's and valve's. and am i going to have to do andthing to the ecu after all this is done?