Small Block Main bearing info needed !

And for harder and higher RPM use, Mahle/Clevite makes an H series of bearings in their tri-metal bearing line, versus the more 'standard use ' P series. Here is a link to their performance bearing catalog, which contains info very much worth reading IMHO for anyone learning this stuff, on the subject of bearings. (You want to download the 'Performance Bearing' catalog.) It explains the different grades of tri-metal bearings from that mfr. The Clevite77 series of bearings has been a good 'go-to' series of bearings for hot-rodders for several decades now.

MAHLE Aftermarket North America | Engine Bearing Catalogs
Thanks for the link. CL 77’s were always my preference in the few V8 engines I have built. Good to know they’re still a quality bearing. I’ve been a fan of Mahle pistons since my early days building VW’s, and have built many motorcycle engines with them. A great product.