And if you think your check 5 more times lol. Also make sure the crank is dead straight. It will provide you with smooth and easy cranking once you put in all the pistons. If your first piston feels very stiff the n you have it at an angle and it will lock up on ya. Also too if your not sure about it let a machine shop that has built a few rebuild yours. Dont forget to use assembly lube on the bearings before you put in the crank or rods.