If you aligned the marks on the cam and crank gears (cam dot at 60clock,and crank gear at 12 oclock), then after assembly you must rotate the harmonic balancer (crank) 1 complete rotation before dropping your distributor in and aligning the rotor to number 1, otherwise you are without a doubt 180 degrees out.
Steve

Last edited by sstock; 04/09/2013 9:46 AM.

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