I talked to Ross Racing today and they cannot make the pistons without spacers. I called CP and they are fairly sure they can but require a sample to make sure. Cost is 100.00 more on the top end but we will see. If I do rods too then this is not a problem because they can make the pistons and rods compatible as a piston guided rod. Rods are bucks though at 1700 to 1900.
I am going to have my rods checked after I get my motor torn apart.