I was not aware of this.

http://cgi.ebay.com/ebaymotors/Oldsm...QQcmdZViewItem

 

What do you want to know? It was a precursor to the HEI, using the same magnetic pickup inside the distributor. The large electronics box in the UHV system was shrunk to the small ignition module inside the HEI but does the same function. The UHV also used a special high voltage coil. This system (with a Chevy distributor, naturally) was also offered on Corvettes of the same vintage. My 68 W-30 has this system.

 

Thanks Joe. I just wasn't aware of this at all, particularly I wouldn't have expected it as early as 1968. Very interesting.