I do not have a billet tappet cover, or a P-pump conversion(YET). But I was thinkin about this the other day when I was lookin at my engine bay which is stripped down for my build. A close and easy way I was considering which would'nt require any relocating of wires, is to built 2 vertical brackets on the frame. Basically spin the ECM 180 deg so it is facing the motor and build 2 brackets out of 1"x1/4" steel maybe 6 to 8" long, weld them to the frame(so they clear the brake lines and the stearing shaft, drill and tap the brackets( or bolt through with a nut) and mount it(only the 2 side bolts, forget the bottom one). All the wires will remain in the stock location. You'll want to make sure it will clear the pump though.$.02 Let me know what you come up with TJ im interested in how you do it.