I found out what happened to Jimmy and Al. ( a '68 and a '69 ). They usually drive seperatley but decided to come down together in Jimmy's '68. Part way to King of Prussia the car started to backfire through the carb and loose power. Eventually it stalled and had to be towed. So far the shop found a melted plug on the alternator. The backfiring and loss of power sounds like what I had when I broke a rocker arm.
Anyway, time will tell and I am sure we will see them both next month, baring any unforseen problems.