The numbers don't look very good. Is your leakdown tester well calibrated? Some of the cheapo ones are no good.
Forged pistons usually take .004" piston to bore clearnce...much more than cast or hypers. So the rocking sounds OK....without knowing the actual clearance. Did the shop have the pistons in hand when they did the final bore/hone? New pistons?
What rings were used? What ring gaps were used? Any idea on the hone finish? Did the shop know the type of, or have, the rings too?
With high leakdown AND oil out the back, it sounds like the rings are not seating properly or are very badly gapped (and possibly some improper oil ring setup). Is this thing burning a lot of oil? How was this broken in, as far as the initial driving? I've used forged pistons numerous times for street and racing and never had any ring or oil burning issues, but I take certain steps in the break-in process.
