Ok, so they are held on with short unique bolts; they have short threads and long shoulders. You probably know this but just in case someone put something else in there. If you have the right bolts and they will not tighten, you will need to replace the lock latch as it is stripped out. they are made of pot metal and once stripped not much you can do. If you don't want to buy new latch/es, you can try a small piece of electrical tape on the threads to try and tighten them up. You best be is just to replace the latches.
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)