I’m now 99% sure I have the 2wd shocks when I need the 4x4 length. This is the gap with the wheel on and full load (truck is on the ground). Not sure if I can return these as I test mounted them.
On a more positive note, I replaced the spark plugs and wires. Old plugs were gapped around .75. Gapped the new ones around .55. So much difference. Truck pulls much better in 5th gear now.