These are believed to be Lunati's and appear to have never been ran. I'm listing them as "used" because I can't confirm that. These came on a set of cylinder heads from a shop in KC and the guy who did the work on them has a very good reputation and one of the fastest "pinto's" in the country. Only reason I'm not running them is because I had already bought a set of springs matched to my cam. These are easily a $300 set of springs. They have the titanium retainers and the locaters that came with them. I had them tested to make sure they were in good order. The specs are coil bind @ 1.080, open load 375 @ 1.20, seat load 140@1.800, should be fine to .650 lift.
$200 shipped. Pm me if you are interested.

Pics here. LS double springs with damper - LS1TECH

 

Sold.