Hey Vanagang,
Cruzing back from Santa Cruz last Saturday, my '86 developed a vibration
that was hard to figure out. At between 50-55MPH a shaking (roughly the
frequency of the revolving tires) takes place when I'm on the gas but stops
instantly when I let off the pedal. This happens on level roads and hills
and only in the above noted speed ranges.

Any clues?
Thanks,
Monte

P.S. Thanks again Kyle for drilling my new rear bumper for the old impact
strip. It fits great.