there is 1 on ebay right now. I know of a hull in n.ftmyers, that is original and clean on a trailer for sale.

the mi 80a 28SS on Ebay looks very nice, never knew they cam w twin BBCs only thought 350s.
Would you need to pull a motor to change the spark plugs?

They are very tight. I've had both and the small block boats are better balanced.

You will need to change the blood in your brain, after changing the plugs in that boat. That's what it felt like, when I did it. That boat has had twin big blocks in it, since at least 1990. The previous owner said that it came from the factory with them in '86 and they looked like it. It was my old roommate's boat until last year. He didn't winterize it properly and cracked both blocks. He sold it to the current owner and that gentleman put it two fresh engines. It needed them, anyway.