The crank pulley has degree marks like a gasser crank pulley. With the IP lug centered in the reference hole as best you can, what is the reading on the crank pulley?
If you can consistently trace the knock to a particular cylinder then I doubt IP timing it the root of the problem. I'm inclined to think the problem is something specific to the pump chamber or rack setting for that cylinder.
Sixto
... stay tuned
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