I pull all the spark plugs first, then the distributor cap, install Thexton. Since I tapped the end of the crank with a retaining bolt, it is easy to rotate the crank and adjust the intake and exhaust of the same cylinder when the rotor is pointing right on the cylinder firing order on the Thexton.
Attachments
thexton.jpeg (157.62 KB, 181 downloads)

Last edited by sstock; 08/20/2019 1:33 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration