im in the process of rebuilding a 150 v6 60 degree eagle spitfire 1991.I had two cyl bored 20 over and the other 4 honed. I ordered 2 pistons with rings and 4 sets of rings for remaining pistons wich are ok. the new pistons came with 2 rings wich are exact in size and both tapered unlike oem rings wich the top ring is larger than the bottom ring and only one tapered . are these ok to use ? I had to send back the 4 sets because they came both rings same size but oem are available top larger than bottom with 1 tapered to fit other 4 oem pistons thanks much.