Seriously though I think some kind of timing maybe I know I'm just spitballing here but in advance spring popped off inside the distributor? Again it just seems like timings off under load..
i pulled the rotor cap off and felt the advance lever, there is defintly pressure on there
when i pulled it off though, the center electrode (im sure thats not what its called, but you guys know what i mean) looked burned and brittle
i got a buddy who has terrible taste in trucks and he has one of them HEI caps kicking around, so ill swap that out, probably monday, and see what she does