I just ran it without the e-clip... The shoes slid forward into the front of the clutch bell after one tank. The truck had a lot of resistance when I tried to roll it with the engine not running. Took the engine off again, pushed the shoes back again and reinstalled the e-clip. It ran fine for a few tanks but now it has some rolling resistance. I think the shoes slid forward once again. I guess I need to start hunting for a bigger e-clip.