What are those plugs telling
you?
Reading
Spark Plugs
How to calculate the overlap
of a camshaft
Calculating
Cam Overlap
Some Chevy cam timings that
might be helpful for determining
Seat to Seat Duration
1/8 mile to 1/4 mile
conversion
Speed.exe---Calculate
tire size, speed, RPM, Gear ratio---
There are some other useful utilities here, also.
Specs on my Bracket Car 67 El Camino Sold
Email me, if you like: Pat Kelley