Trouble with pertronix ignition

Need a solution guys. Been through 3 pertronix ignitions in the last 5 years. 1 was a shorted electric fan maybe. Last 2 I don’t know. Have 12 volts, off ignition. Have a blaster .03 ohm coil. No resister. I do run a old sun tack 30 years old. Are pertronix igniter 2 not compatiable with old tacks? May not matter but I have converted my alternator to a 1wire alt direct to the battery so there shouldn’t be any spiking there. Ran a relay last time straight off the battery so it would get 14 volts when running. Distributor is reconditioned from autozone for points. Not manny miles in it maybe 500. Just stumped guys any ideas? Motor is a 360 mild tune no racing on the last 2 ignitions so no high rpms.