Ok so I popped in so oem 00 piston rings into 100k block this puts the ring end gaps back to perfect as new min end gaps 0.20 top ring. 0.36 middle ring. As previously mentioned npr rings puts this 100 k motor back in the oem spec ballpark,, npr same size as 0 ring size. Choose your poison
...so if you’re doing head gasket new shells. Why not pop in some rings, lap in the valves new valve seals , may as well do new valves springs ,,jobs a gud un