That LS-6 Chevelle Convertible was just that,and not an LS-6 equipped w/alumnium heads from the factory originally.
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.
Yep..back somewhere around 1999-2000.
https://www.yenko.net/ubbthreads/showflat...=true#Post33293