I think I've bitten off more than I can chew............
My pistons are Speed Pro, part# H273CP
9.0 - 1 with 58.2cc heads........I have no clue how to convert it 
to 64cc?? 
 
Lift Limits??????   The valve reliefs look deep but I don't know?
I can still sell these pistons and go with a Stroker kit......I need it all anyway??  I would probably be safer that way instead of mix-matching everything although it might blow the budget out the back door!!!
 
 
Is it as easy as buying a stroker kit and drop it in??  
What about any block work needed???