This has been here for a a few weeks. This ad states $3500. There is another, for the same car, asking $5000, and stating a 455 Olds. But you can see the BBB/SP1/Poston covers. https://inlandempire.craigslist.org/cto/d/buick-race-car/6207605709.html
CHEAP if it really runs 10s...Definitely a Buick engine. In addition to what you stated, Olds has the distributor in back.
It does seem like he's just spitting out randomness that he's heard from people, especially in the 2nd add. 3 speed Powerglide, for instance......
