[Schonyenko2]

[ QUOTE ]
"Not to change the subject, but I seem to recall an LS-6 conv. with aluminum heads that had the build sheet."

That LS-6 Chevelle Convertible was just that,and not an LS-6/L-89.
Bill Clement at ChevyCraft in Tex. was the one who owned it and made that claim at that time.The paperwork was doctored to reflect the Al. Head option,and soon disproven.
That car was orginally sold here new at Dick Wickstrom Chevrolet in Roselle,Il.back during 1970.
I don't believe any 1970 LS-6 Chevelle was assembled w/L-89 Al.Heads from the factory.

[/ QUOTE ]

The article I read was from years ago on the LS6 842 chevelles. They claimed at the time there may have been 3 I believe. The article talked about how Chevrolet had an issue with doing it as the LS6 was a new motor using old 842 head design.
Now perhaps It's the same car that Rick P. mentions as having bogused docs. But the main subject matter of it all delt with unusually optioned cars not just L89 options. Options like liquid tire chain, optic fibre, etc. Seemed like it was a Super Chevy(not always the last word in absolutes.)
If Rick N. says he believes there are none until proven so, I would agree with him.
As far as novas again, they present a different problem in authenticating as there is no specific suffix code for an L89 application as there is for Camaros, Chevelles, or Corvettes. That's why if there ever were any, you would need verifiable paperwork, or a credible original owner.I understand that it sucks that original owners sometimes get "encouragement money" to remember things that weren't, or bogused docs. But unless you want to pay big money for something that isn't you'll need to be very careful.