guys I dont know much about these cranks are these going to be a direct bolt in item? Will this keep the displacement the same? Will you use a stock piston or a aftermarket one?
Bolt-in, ah...no you are going to have to let Haydug install it....
JUST KIDDING.
Yes, they will bolt right in (with the appropriate mechanical skills).
You will be able to use the stock piston or aftermarket one of your choice. Haydug will have some sweet ones soon (if not already), that will use the stock bore and one (maybe two) bigger bore sizes. If you are going to race in sanctioned races, use the stock bore size piston (was 432cc will be 449cc). Otherwise go with a 450 or 460 piston kit. (469cc or 478cc)