Installed the IP yesterday, day started out at 4F and about 8 hours later as I finished in the dark it had gotten to 16F WOW what a long job to do outside this time of year. The original pump removal was by far the longest part of this project I did not remove the radiator, the PTO shaft , fender or any steering components. I have a 5 ton hydraulic steering set up on the outside of frame rail so nothing was in the way of the IP.
I timed the Engine and original pump prior to removal at least I timed the engine perfectly but found that the shaft on the forward section of the IP under the 4 bolt window was not perfectly aligned with the indicator on the pump housing it was before the line by nearly 1/4 inch (this is with the pump still fully installed and engaged with the engine timing gear.) and if I lined up the IP then the engine would be 3/16 past its intended timing mark.
I decided in the end to time the engine to its timing indicator and time the new pump to bring both lines(engine timing line, IP timing line under 4 bolt cover) to there intended positions.
Timing the IP with the gear under the engine timing cover was fairly quick and I had timed the new IP on the work bench prior to installing it so it was a very straight forward bolt in.
All and all the job went as well as could be expected outside in the cold with a trusty salamander heater aimed at my back for most of the job, engine fired fairly quick it did take a pump of the pedal to get it to turn over but once it fired it was good. Idle was set very low on new IP about 550RPM so I set it to just over 800RPM which is where my last pump had been set to ,it holds idle steady and can once again move the truck in first and reverse with no additional pedal required.
The old pump I did not dig into much yet but worth noting was injector port #2 on the HH was leaking and the fuel inside the HH was very clean and no visible debris.
Thank you all for your tips and advise, I had hoped I would have found resolution to the original problem during removal but will have to look further into that pump and post findings.