Time to install tires on my truck camper setup

I can create a new topic if this gets no response, but has anyone installed stable loads on a SRW Ram 3500? The fron on mine has ~1" gap, but the back is much less. I can't fit The bolt in the front let alone the back. I'm sure I could jack the truck up so the axle pulls down on the spring pack or use a pry bar to open the gap. But, if the gap is that small in the back, will I be able to get a single wedge in at all?!