I wouldn't use 10W-30 anything and especially not Mobil 1, it's too thin but will keep your oil pressure down a bit if you haven't ported your relief hole. Go with your favorite flavor of 20W-50 on DSM motors, your bearings will thank you. I personally don't use synthetic anymore, my car doesn't see enough miles in a year to warrant a change, it gets changed every fall for storage regardless of miles.
And Clevites are still one of the most popular bearings in domestic hp engines, just not as popular for imports anymore. They're not that bad, they just need a little clean-up and inspection before using them, which you should do with any bearings anyways. I've installed plenty of Clevites in high horse DSM motors and I've yet to have one fail. I have switched to a different brand for motors now though.
