racingjunk.com  there is a genteleman has a never asmebled all oringinal aluminium  yenko 427 for sale  

There never was an aluminum Yenko 427. Unless it's a ZL1 crate motor or an L88 crate motor, it's not right. Yenko used the L-72 427 (iron heads) in the Yenko super cars.

I don't know of anything on record that Yenko did with a ZL1 motor.  

Well that would be more than a 426 huh....uh yeah phill you are correct it never happened. It sounds to me like someone on racingjunk is triing to mess up a new hot-rodder....what a shame..