I have recently purchased a 1972 Cub 154 Lo-Boy with a 3160 belly mower. I do not know the difference between a 3160, a 3160a or a 3260. I see various references to all here. Which is most desirable for general mowing, etc...? I have included pictures of my tractor
View attachment 1 when I picked her up.

View attachment 1 when I picked her up.