Get the cab bolted down then line the bed up to the cab lines. Works best with at least one other person (or even two) so you can stand back far enough to see the body lines then let the others slide the bed back and forth to line it back up. Seems that it is either perfect on the first shot or it can take half an hour of more of fiddling to get it close enough.

 

sounds good, I'll get a couple more people here to give me a hand. I've got the cab bolted down so I'll give the bed a shot at getting it lined up

 

i did my bed first.... and didnt get to the cab for almost 3 weeks..... anywyas, i loosened all the bolts, and the bed shifted on me... luckily i dotn have any lines from graphics on the side.... but i used a finger guage and jsut lined things up with my finger to line things back up.....