i have been thinking about buying a hotrods +4mm stroker crank for my blasty and need to know how to mill the head and cases +2mm (or +4mm not sure) for it to fit if i do get it. while i'm in there i plan on putting in new bearings and stuff as well. i have worked on plenty of motors but never done a stroker and am not familiar with blaster motors. i'm wanting to learn more about them and get mine fixed up to outrun my buddies and all that good stuffI:I thanks for any help.