1968 C10 Cowl Bolt Help

[swood]

All, thanks for reading my post and hope someone out there can help me. I am trying to figure out how to tighten the drivers side outer cowl bolt that is shown in the picture. I was hoping that there is a nut on the other side and a simple tighten would do but the bolt just spins, I am even having a hard time backing it out. After looking on LMC's replacement parts it seems that this is just a screw and has no bolt or washer holding it together from inside.

Does anyone have an easy way to access this bolt, it seems impossible to get to without creating a 5 hour project? The main issue is that it is loose and the door is now rubbing on the bolt every time it is opened or closed, and it is getting worse.

Any ideas are greatly appreciated, thanks.