Help me date this 302

So, I bought the block. Got it for hella cheap with new arp head bolts, a full gasket set, plus everything the guy had new for this. Anyhow, digging it apart to see how bad she is, realized after popping the heads they are e6se heads and dished/flat pistons. Any thought of what this came out of?
 

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E6 heads were used on the non-HO engines after 1986. There’s a date code cast into each head just like the block, and I bet they are 1988 dated.

That engine likely came out of a 1988 non-HO car such as a town car, or a thunderbird.