"Maltese Cross" and non standard sizes from factory?

I have heard rumors of a "maltese cross" being stamped on a block in order to identify an engine with non standard size crank/bearings/something. Is this a fact? I ask because I am pulling apart a 1990 TBI 360 which I believe to have never been apart. I discovered the rod bearings are .010 under and was wondering if anyone can identify these bearings as factory originals? And stamped on the block near the dizzy hole is a sort of cross. Now this cross is not what google shows as being a "maltese" but maybe this is what signifies a non standard engine?

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