Pistons specs question for 340 build

Just had a look at the PDF that Nat posted the link to. That has now given me a very good idea of weights. The Mahl PowerPak piston range goes from 470g to 512g. The heaviest one being what my engine is: standard stroke 340 + 0.030. So that SRP forged I mentioned previously at 462g is quite light. If there is only a few grams difference between the KB Hypers and the DSS FX1 (ie if the KB's are bit lighter) I might still buy the DSS. They also offer a ring package as well.