[harryrcb]

Hi got a couple of questions for you. I might have missed it but did you take the tensioners all the way out? if not do that. As far as the center bolt, that should be relatively easy. Line the bolt up and get a thick washer or space and tighten the nut, holding the stud with a screw driver, once seated you should be able to get the nut back off.
After you tensioners are completely out start the cover on and wrangle it back in place, you may have to pry on the case but be very careful that you only pry on a reinforced section of the case. I have a couple that did this.

For others who are going to do this job please!!! do yourself a favor and set #1 piston on top dead center and lock the crank. Also lock the cams on bank 1-3 no need to even use the set screws if you do this and if you get in trouble this is where the crank and cams need to be to get out of trouble.

Good luck and if you need more help pm me, I have done several dozens of the IMS bearing changes using both LN engineering and Pelicans bearings.