So I ended up with a 292 marine engine I hope to make a road engine, but there are issues I can't figure out.  It's a B9 block with one 113 head and one G head, supposedly rebuilt 20 years go with only a few hours, the crosshatching in the cylinders and the spotless interior of the engine would support that. However, the  0.020 under bearings which are dated 1997 are toast.  The 97 is close enough to 20 years it sounds reasonable.  The rear main had bearing material still attached to the end of the bearing the looked as if it were planed off. The crank journals look pretty decent.  I had some 25+ year-old plastigauge that was pretty dried out, so I don't know how accurate it is , but it showed plenty of clearance, in the high side of acceptable.

Now the part that has me really confused, B9TE-L pistons with ECZ rods ( 7 that look like I'd expect and one that has a cap with 2 long ridges instead of one fat one on the middle ).  I would expect the 312 rods would not bring the piston up far enough, but my wonderfully accurate measurement, straight edge with a stacked feeler gauge, shows about .035 distance piston to deck.  A dial indicator with a magnetic base  showed more, but only about .050-.060.  Either way,  EBU rods would seem to be way too long. For what it's worth, there was no ridge in the cylinders and the ring gap was a consistent 0.028 all the way down.

Anyway, some questions:
Should I just have the 113 head milled, or do a little grinding on the G and then mill both, or ignore the compression difference. Just a mild street engine.
I'm going to need to bore it, so the pistons will be different, are the ECZ rods the ones I should use or should I find a set of EBU rods?
Any thoughts on why the bearings would go so fast?

Thanks for any help and advice,
Don