Rebuilt Engine bearing wear

Hello all. My freshly rebuilt magnum 360 was making a strange ticking type noise. I decided to play it safe and drop the pan to check the bearings. Well they don't look great. I only checked 4 tonight and I didn't like any of them. Crank was polished and all bearings were plastigaged. Any help here? Crank still looks perfect from what I've seen. Just the bearings seem beat. I have new rod bearings already but how do you replace the mains in the engine? I've heard some people do it. I'm talking to the machine shop tomorrow morning. View attachment 1715930899 View attachment 1715930900

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The rod bearings do seem worse then the mains for sure.

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