Identifying a DZ302

[markinnaples]

I've mentioned before that my Camaro's 302 lost an oil ring so I was going to take out that engine and build a 383 for it and sell the 302 block. I know the guys personally who built it back in the day and some other info that tells me the engine is an original DZ.
Also as I've stated, they decked the block and removed the engine pad stampings unfortunately. I've tried the police method of using acid to bring the numbers back but the stampings just aren't showing up. They must have either removed a fair amount of material and/or the stampings were a little light like others I've seen online.

So my question: Are there any other ways to evidence that the engine is a DZ302? The casting number is consistent with the 1969 DZ block castings (3970010) and I've read that there may be a way to determine from the crank journals? I'm certainly not experienced in this area so I appreciate any information from you all who know a lot more about this than I do, thanks.