Hone-o-drive unit on ebay...

[69Z28-RS]

I haven't seen one of these for sale in a long long time...  Back when our cars were new, these were the way that one could have their cake (acceleration gears) and eat it too (and drive the car on the highway)...

https://www.ebay.com/itm/352403748520?ul_noapp=true

[Mike S]

 That looks like it would be a tight fit in the tunnel.
Seeing the sellers name 'super-novass' made the song 'Champagne Supernova' pop into my mind.
Now I can't help singing it 

Mike

[Kelley W King]

I read an article about installing one in a first gen and it did require tunnel mods but it was denting it not cutting it. I may bid on it if the price is right. The gasser I have not built yet would be cool with 488,s and the hone. Big block, 400 turbo, PS, AC, 488,s, and Hone OD.