Yeah, I have seen the framework and the headliner pieces. There is no way those pieces would fill-up that trunk. And the spare tire is not taking up room inside the trunk. I think it is kinda crazy to believe that the only weapons inside the JFK Limo would be the standard service revolvers carried by SA Kellerman and SA Greer. They had to have some heavier firepower inside that Limo Trunk.
There was always a shotgun stowed under the back of the front seats in both the jfk limo & Queen Mary.
I seem to recall that, in addition to the AR15 in the care of SSA Hickey, there was praps a Tommy Gun in the trunk of praps the jfk limo & in the Queen Mary trunk.