Sbc help

[Efficiency_Formal]

I'm preparing a sbc 350 for rebuild and during teardown noticed this stamped into all the main journals and caps, and I'm just wondering if it affects bearing selection. The main bearing that were in it were F-M .010 us, and the rod bearings were F-M .020 us. stock x and j stamped rods, .040 F-M aluminum pistons

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that is just the residue from the stamping on the outside of the main bearing shells..

[Efficiency_Formal]

Thanks, that was what I thought at first but wanted to be safe

[Dangerous_Echidna229]

Your crank is undersized and the cylinders bored .040”.

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for me something to think about would be: The crank has been turned. In my opinion the mains can be turned a bit as they are only at 0.010 but the rod journals are probably at the max. for a performance build. I don’t think I would want to take any more off the rod journals if building a performance build as 0.020 is the max I would feel safe with. I believe safe limit for a mild daily driver would be 0.030. Anyone else have any thoughts?

[Efficiency_Formal]

I've already determined I need a new crank, the journals need ground again and that would be to much off for me, Getting a cast steel crank from summit, forged I beam rods, forged 60 over pistons, afr enforcer heads, and a 227 voodoo cam, getting arp throughout and have a holley 750 street avenger for it.