I purchased a set of Prothane urethane mounts for the 1977 K10. I am finding that the mounts tilt the cab forward (rear end higher than front) a few degrees. I am in the process of test fitting new fenders and rad support before heading to paint. Was having an issue getting the fender gaps to align - tight at the top and large gap at the bottom (like 1.5 inches). Thought maybe there was an issue with the aftermarket rad support. So I put the original one back on. No change. Started looking closer at the cab and realized it was tilting downward at the front, at least ever so slightly. So I shimmed the front cab mounts up by 1/4inch with a few washers. Problem solved. So I am wondering, has anyone used the Prothane mounts before? Any issues with the height (maybe front too short or rears too tall)? Unfortunately I no longer have the original rubber mounts to measure them for reference. Does anyone happen to know what the height is supposed to be between the cab floor and the top of the frame? I ask because with these mounts it looks like it is sitting really high off the frame. I will snap some pics and post them.