Looked them over ten times and the only way the one LMC sent me is push in from front with the ears spreading out which causes most to snap off. I found a different style in the part store that says it’s for 72 through 78 trucks and I gave them a try and while not perfect they seem to be holding for now. They easily fit in and then with a pair of pliers I turned them to where they are locked. Once I started screwing in the headlight bolt they want to twist sometimes so I stop and twist back with pliers. I am waiting until I get the lights adjusted right where I want them before I put everything back on but so far they are holding. I only have one of the ones with the little ears installed and I gave up after that on those ones.