Hey guys I'm new to mazda engines and cars (really a diehard Nissan guy), and I just pick up a red 1989 323 gt sedan for $700....... The problem with the car is that it has blown rings, in which it give me the prefect opportunity to do a full motor build. So far I already have forged rods off ebay, and looking for a decent piston set that not all that expensive..... So what do you think about these which are .40 over to make a bore at 79mm (1.7ltr)