You need to order the stud kit first and let a machine shop do it.
sometimes they need to be pressed in and in doing so makes the big end journal out of round. So it will need to be honed to make the big end true. You can not see this distortion, but you will see it when you take apart the motor and notice there are wear spots on the bearing. You could get loss of HP and poor oil control and even worse a spun bearing at High RPM.

Are you assembling the motor yourself?

You will need to plastigage the bearings.

Pistons:
Weigh the stock pistons.
Ask JE what they expect the new pistons to weigh.

What piston rings are you planning to use?

I hope you are balancing this motor?