Oil Pan considerations (not clearance)

[68c10airstream]

FAKKY, I mad my 2001 motor mounts work for my 5.3 4l65e in my 68 c10 with the "F" body pan laid low on the crossmember. Pan to crossmember is probably 3/4" and the sump is above the low area of the crossmember. The f body pan flat bottom is about at the same plane as my trans pan. My only issue after install and the mounts settled in, the sump area forward 90 degree corners just touched the crossmember. I took a sawzall and for the time being notched the crossmember until i pull the motor and tidy it up them.

As far as the factory ac compressor, i will be doing that install eventually using a trailblazer SS compressor because the suction/discharge fittings are forward/rear not side by side. This way i won't need to notch my frame. I suspect i may need to massage or cut out and make a slightly sunken plate for clearance for the compressor. I would rather modify my crossmember than notch my frame but that's just me.

I like the low mount gm ac system, tidy, low, out of sight, easier to do engine work, separate short belt. Bolting on pre-made brackets is easy, but i like to fab things up and be different. I don't like a bunch of chrome, anodized this and that, i like the subtle look. It's great we have these options, and the hobby is this strong. Good luck!!