Crosswind air gap clone and ram truck serpentine setup

Hey Sport74,
Are you using the Van or Pick-up AC/Alt mount on your engine? Looks like there is a difference. I referenced your earlier pics and some from RockAuto and the compressors are a lot different in length but I could not get a good enough view to reference some measurements. On the van compressor, the back of the unit is just past the mounting holes. If I had to guess I would say 3/8". I have a Pick-up style compressor but does anyone have the Van style for comparison? The front of pulley to back side of rear mounting holes would be really helpful.