<VV> Misses like crazy

[Jim Simpson]

Also check the "little black wire".  That's the wire that goes into the
distributor to connect to the points.  It flexes near the entry point as
the vacuum advance works it back and forth and over the years and as the
copper wire work hardens, it can break internally.

When you first start or are accelerating, the vacuum is low so the wire
might be held in a position where it makes contact, but when cruising the
vacuum advance moves it and the contact becomes intermittent.

Worth replacing every decade or two...

Jim Simpson
Group Corvair