Hey fellas, So I’m a little confused and can not find a straight true answer. I’m looking for some 57 Caddi caps to run on my 51 Mercury however I’ve read the repops fall off pretty easy. What I thought was the original caps ( the ones on the right ) with smaller mounting tabs are the repops and all true gm caps had the larger mounting tabs like the cap on the left from What I was told. But when I read the info on here people say the caps on the right are real and the caps on the left are repops. What is the truth? Which are original? And which stay on the wheel the best? Thanks!