i know a few that have used the gm modules but its a lot easier to just use the duraspark box instead. i took the entire loom,dist,and box from a wrecked 79 torino from a salvage yard for a whoppin 25.00 and had my cleveland goin that evening.. here is a site that explains alot about the converstion,this info woulda been nice when i did my car in 1984...lol
http://users3.ev1.net/~bmarr/duraspa...on_upgrade.htm