Yer gears I n the floor 3rd time clutch been done over many years of hard work. Forgotten were they all are . I'm guess the new topper is a bit much for her to start up and helped cause it this timeLow profile SG2, possibly/probably with gear levers in the floor??
There's an auxiliary fuel tank to contend with too. And remove the MFWD shaft, check and replace the sealing bush while it's off.
It's a good idea to replace the release bearing assembly in the clutch housing as they fail when you don't want it to,,,,
Not sure yet.Where are you getting new clutch from?