Thanks for the comments from everyone. Rod journals look decent, visually. Short-block still assembled. Couldn't dig deeper wothout tearing it down, and he didn't want to disassemble it. Cylinder bores look clean; no really visable marks/scoring. Rods looked really clean when we sprayed them with WD-40 and wiped them down a bit.
I was looking not at the head thumbprint with the "A" in it, but the other one. Now I see the heads are probably nearly untouched. Thanks for pointing that out Rod. Someone did a lot of work inside them though.
Maybe I'd keep the roller rockers to use on my 427 build; maybe not. Not sure if I even want a roller cam in my stroker.
Anyone know if the "D" scratch is significand? Probably nothing important, but would like to know what it might indicate.
Will know more about this engine in the next day or two. Thanks again...