> I'm wondering if that's MY PROBLEM of getting 'vapor lock' when on long
> drives in 90^ temperatures,
Just a thought, have you tried using a different ignition coil? My
nearly-new Lucas Sports coil has apparently gone thermally intermittent: it
works (more or less) when cold, but the spark gets progressively weaker as
it heats up. Tuesday, while driving in stop-and-go traffic (ambient only
about 80F, but underhood pushing 200F) the engine started misfiring badly,
then when I pushed in the clutch it died completely and refused to restart.
After it cooled off (and a new condenser was installed), the engine started
rough, but then idled smoothly. But as soon as it got thoroughly warmed up
again, the ignition quit again.
A different coil seems to have solved the problem.
On that topic (sorry for the thread drift) has anyone ever had problems with
a Pertronix "FlameThrower" coil?