[Ackattack]

Are you planning on using the lsx A/C compressor in the stock location?

If so:
#1 won't work
#2 probably won't work
#3 should work.

I made my own adapter plates (style #3) on some tubular engine stands. I have a set of adapter plates like style #2, but they would not work cause of the A/C compressor. That being said, I have an F-body A/C compressor on corvette accessories. So the truck set up may be slightly different sized and allow you to run that set up.

Also, My engine stands are set back as far as possible. Can't remember if that is considered the "6 cylinder position" or not.