In doing some research for my rebuild I've heard a lot of good things about Clevite bearings, and as it turns out they do have bearings that should fit my engine, but only in trimetal. I've seen other options from other conpanies that are bimetal, which makes me wonder, in terms of real world use what's the difference in using one as opposed to the other? This is for a stock 403 rebuild which is intended to be used as a daily driver/road trip car for as many miles as possible.