Well thank you to each of you that have replied thus far, I'm still hoping others will chime in if they have something to add.
John Vega$69 sounded like he was interested in it but I think he had a typo in his reply so I can't be sure?
Tim your reply is pretty much inline with what my thoughts were when I posted the question. I'd have to counter offer and get it for much less than $1,500.00 if it were to be a worthwhile endeavor. I'm thinking the guy that offered to sell it to me is trying to get his machine work expenses out of it plus a little extra spending money...
Everett's mention of the VIN possibly being on the block by the oil filter is a maybe (not sure what year that started, and if it was on all blocks) and if it is there, they can be very hard to read and I'm not sure it would have the rest of the block ID with the DZ code? If no DZ code it doesn't really prove it's a true 302 block or am I missing something?
Brian what you wrote is also pretty much where I was at when I posted the question, it could be any of those other blocks posing as a 302 and I'd still have to verify the crank and rods were real.
Dave, your points are all valid but this short-block is already disassembled so it should be easy to photograph the parts and then check to make sure they are correct before purchasing. And I would think anyone looking at my car to purchase at some point many, many years down the road when I can no longer drive would be educated enough to recognize a 406 block from the other small blocks and I would not try to fool a perspective buyer into thinking they were buying something they were not. Like you Dave I consider my 406 to be a great upgrade for my car and would think most other enthusiasts of the hobby that own a classic car like mine that want to drive it so others can enjoy it would feel the same. If they don't, they should be looking at a different 69 I guess
Even if everything checked out and I could get it for less then he is asking (which I probably could, but no idea how much less), I'd still need to find and purchase correct heads, intake, and all the other accessories and brackets and that would cost far, far more. Right now I'm not feeling it would be a good investment of my time to even check it out, but I'll continue to think on it and wait for other TC replies, all of which I greatly value.