You've probably got 49-54 car hubs and drums on your axle. If they're the original drums they will be riveted to the hub with 3 big rivets so look close before you use a puller. If they're not the original drums you'll still see the ground off rivets on the hubs. I've got this setup on my 31 pickup with 52 car wheels. It's a cheap way to get 5x43/4 bolt pattern.