Hello, new to forums. I have a 74 150 pu with a 392,starts up ok but has some issues with 2 and 4 holes on pass side. Put in new plugs wires but when it runs 4and 2 will only fire the plugs when I hold the wires up and over the holes on the dist cap,if I plug them back in the hole goes dead and the plug wont fire,got got blue spark, and all the rest of the plugs fire fine,im at a loss here as never had this happen before thanks for your time dn
