advance springs?

FWIW,

More windings means less tension, larger spring diameter means less tension, larger wire diameter means more tension.

Great job explaining it Dave.

Dart66GT The Mr.Gasket kit may be ok but I'd be wary of generic stuff. I've had problems making some of that stuff fit right. Mopar perf. sells a kit made specifically for the Mopar distributors. Here it is on Mancini's site

http://chucker54.stores.yahoo.net/disadweigspr.html