'72 with leaf springs?

[crawdad]

I've recently bought a '72 LWB Fleetside with the Cheyenne package. This truck has leaf springs under it. Didn't the 72's all have coil rear springs, or did Chevrolet make them with leafs and coils? I would also like to ask if anyone knows if replacement bed side panels are made for the LWB fleetside? And finally, on the inside of the cab, just above the windshield and just about on line with the bolts for the visors, is a line of rust from one side to the other which is rusted through in some places. Does anyone make a patch panel for this, and how difficult would this be for a normal body shop to repair? Sorry for so many questions, but it seems the more I work on my truck, the more I find wrong with it. Thanks.