Piston Question
 

not sure if this belongs in this section but i'll try. i gues this is A STUPID question but if i bore out my block for 84mm pistons would i have to bring the head to get machined to match. im thinking i do to make good combustion but i could be wrong. thanks for the help

As long as your pistons don't come out of the bore at all at TDC it will be fine.

Re: (mgags7)
 

you dont have to. but some people do it anyway. remember, opening up the combustion chambers will have an effect on static compression.