Going on maybe 18 years on my Y block with Ignitor and maybe 10 or so with Flamethrower coil, stock 30 amp generator. No problems. Does seem to idle better and start a little easier. They've sold millions so they are doing something right. It's very important to use a tight, serviceable distributor if points and condenser are to be used, the mechanical "switch" nature of contact points means any runout or "wobble" in the distributor shaft will cause the dwell time to be erratic. There used to be all sorts of arcane rituals associated with points and condensers - spring scales, bending and aligning contact arm, observing which side the point surface was "growing" and lengthening or shortening the condenser lead as necessary. Overseas points and condensers are junk and not to be trusted. Lots of good NOS still available.