Listen to this noise...

TrailBeast said
I think it's too loud and fast to be either of these but hey, it's worth a look.:D
Sounds like crank speed and not distributor speed.
(but then the converter has 4 bolts and the distributor has eight contacts so...)

You know i was reflecting back to the OP when he said he replaced the cap and after 50 miles it looked worn also. That's odd