Slant six timing.

Do you have a piston dead stop tool?

Put one in the #1 spark plug hole and turn the engine intil it hits the stop. Put a mark on the vibration damper. Then reverse the direction and turn the engine in the opposite direction until it stops. Place a mark on the damper. Now find the center point between the two marks, and that is your TDC....

http://www.summitracing.com/parts/pro-67581