this thing smoked like hell and I took it apart and found that the piston was alll scratched up and the bore it also is all scratched up maybe can be reamed and it will clean up if so can I just put a new stock piston in it or can I go bigger, .10 ,20 ,or .30 over , if not how hard is it to get the sleeve out of the so called block and do they sell one overize to get that little more HP .I am new to this site and would like some information or maybe a kit or any thing that can point me in the right direction on this topend rebuild , thanks