Don't forget to check the oil rings. Ran into several batches of Total Seal standard type file fit rings sets where the oil rings butted together in the bores and had to be opened up some.
I also had a bad batch of lower iron rings show up here and they were to brittle you could NOT get one over a piston without it breaking into 2 or 3 pieces. Total Seal very quickly replaced them and didn't even question the issues we were having so I supposed they knew about it already. That was about 3-4 years ago and we've done a few since and the bottom rings were fine, but still something to keep in mind.
Far as end gaps go, for decades I set the top rings at .018" and bottom rings around .014-.016". Around 2000 we started hearing about potential benefits with opening up the bottom rings so I went to .018" on them. Zero issues before or after that move and none of our engines have ever had any problems in that area.......Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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