You can get the bore done first if you want. The thing about it is when you order your pistons for the size of the bore, you have to check each piston itself to make sure that all the pistons are the same size as you would have to check to make sure the bore is all the same size. When they make pistons, they could have one or even two of them off. You would have to send back the one or ones that are off. This is very cridical. When I received my pistons from (KB), one was out of size.

Not everyone is perfect. Take your time.