Instead of fixing my failing diaphram, I converted the inside of my dist. to a 289 HiPo mechanical advance setup. The problem is the arm on the advance unit is in the way. I found an old advance on Ebay that had the arm already cut and used that and kept my original '69 unit to be rebuilt someday. I got my parts from Mike Ulrey in Fla. I remember the cost being around 20-25 bucks for the parts and about 40 for the advance. I don't remember the cost to rebuild the advance, but I think it's plenty more than that. Anybody know for sure? I did this more for performance than anything.