Identify P cams

[rick anderson]

I have a set of P cams I'm selling on ebay and I was asked if they were for 900 or 1000.
Can some one tell me the difference and how to identify these cams?

[motorhead1]

57-70 engines used a vertical timer. 71 and later timed from the #2 cam. If the #2 is larger on the cover side and has a small threaded hole in the end, then it is for 71 and later. Other than that, lift and duration are the same for 900 and 1000.

[rick anderson]

Thank you motorhead1.
Rick.