Wondering what piston you have that u can recommend for nitrous in a 102 mm for a 690 and also if u carry carillo rods? Could i put it on or would i need to send u my crank and is there anything else u recommend putting in to beef up my motor. Looking to run a decent amount of nitrous! Any other reccomendations. Heard a few reviews on the 4 mill cranks and some say to get it and others say it may vibrate or break!