Thread: 440 74-Jensen Mopar timing chain

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Your English is far superior to my Norwegian.
By using the rectangular stamp mark on the crankshaft sprocket, you have retarded the camshaft 4 degrees from the "straight up" position which used the zero stamp mark. This position will make less cranking cylinder pressure and less low end power, but will slightly increase top end power and extend the upper rpm range of the camshaft slightly. Edelbrock does not recommend using either the advance (triangular or delta stamp mark) or retard (rectangular stamp mark) settings with their Performer Plus or Performer RPM camshafts. They are very specific about using only the "straight up" circular stamp mark.
http://www.edelbrock.com/automotive_.../7000/7800.pdf