Timing Pin Stuck, help please

[Heepdriver]

This is pretty much how I feel but one side is an inanimate object. Went to set my timing and begin the install of new Bosch 230hp f-700 CTD injectors and I can not move the timing pin. I went ahead and got a new one and an o-ring from the cummins place and they look the same from what I can see and remember. But i beat on that thing with a little hammer even, i went and got my Dad (a wealth of knowledge ) but I hate doing that. Spent probably 3 hrs trying to pry twist and hammer it loose. Did not go so far as to break anything though. Put it back together and have been driving it for probably 4 months now. have time too put it down again and would like to get it done. Any help with the pin or comments on the injectors would be great.
As long as I'm on here I have been having a driveline vibration between 62 mph and 73 mph at coast, especially cresting the top of rolling hills. More than 6lbs of boost and vib goes away. Problem started 3 months after I went in an did a fully splined main shaft and new small 5th gear. Tranny was great until I had a customer in the truck with a trailer out back and he wanted to see how much boost I could make. Matted it in 5th pointed straight up step hill at about 1750 rpms. 32 lbs of boost and a vib and i believe the limited slip seems to a little more chattery. I've wondered about carrier bearings in the rear end, pinion feels tight. I feel the vibration in the pedals and the shifter, t-case shifter and the floor of the cab as well.
Thanks again for any help you can give. Sounds like I need to tear the truck down and start over again.