Y'know, I said the same thing. I even went to their web page to try and confirm it myself.... Got a lot of eyestrain looking at the pics; but I don't think it's an SBC. Doesn't look like it has siamesed exhaust ports, and the waterpump looks wrong (almost looks like an FE pump with the "standoff mounts" that serve as water ports).
Of course, it looks like the dizzy (or at least its mounting location) is on the wrong end of the motor - typical GM/Mopar trait Hated that on my one-ton's 350; hate it on our two V6's (cut-down 350's); glad it's covered under the 7/70 on the wife's Ram's 360 (somebody else's problem for another few years ).
Yeah, he does mention it's a SBC. I also thought he needed A LOT more info in order to sell it for, as you saw, around 180k. I also want more info. Just thought it was an interesting car. .