The crank is the 1178 crank it measures 2.450 on the mains and 2.0995 on the rods so that is standard...Right?
Bearings were GMM 0400 & I think GMM 0200 I think that's what they read...
Pistons are standard bore but they are all TRW pistons on the inside they all say TRW...Is this right?
I would like to just ring and bearing this engine and keep as much as I can.. Can anyone tell me if this engine would have left the factory this way?
Sounds pretty close to original in the bottom end - Pistons were L2210A TRW units from the factory, mains should measure between 2.4479 - 2.4488", rods should be 2.099 - 2.100". Bearings sound like they're marked GM Morraine, which should be stock bearings. I would micropolish the crank, recheck it and bolt it up - the journals are Tufftrided, and wear very slowly compared to a reground crank (that would have the Tufftriding removed by regrinding). My 1178 at 42K miles had no wear, now at 72K shows no wear, even with 12.5:1 piston duty for 30K miles. Watch for piston wear, though - my cylinder bores had little wear (.0002 taper), but my standard pistons were worn in the skirts. I always heard that the blocks were a higher tin/nickel content, but that has been debated here before - better materials and castings than earlier blocks, I suppose.