They say that the electronic wizardry inside the Rev-N-Nator box compensates for the lack of a vacuum advance, and that the vacuum advance was hindering a faster power curve. I followed the instructions, plugged my vacuum advance, and noticed a power increase. In the case of my '70 GTX, the engine was a mere 400 HP engine...nothing fancy, so it wasn't hard to wake it up a bit.
Achieved 312rwhp on a Dyno on the first run. Unfortunately the Dyno guy was snowed under, so tuning on the fly wasn't possible. As can be seen on the printout below. This was my second session on a Dyno, a couple of years after installing a Rev-N-Nator.
I drove away quite happy. :)
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