Check the points, condenser, distributor ground strap and all ignition LT
connections, these can all cause erratic tach readings, and ignition
problems (like timing, which can be affected by points gap) can affect
running temps.
PaulH.
----- Original Message -----
> Except for my GT, who's tach(which was converted over to neg. ground)
> started indicating 4K was at 50mph! Running much higher rpm than ever
> before. Idle jumped to between 1500 and 2000. Water temps were high,
> too, about 200-210 degrees at times( I usually run no hotter than 190
> down here).
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