Done that a time or two. Easy enough to drill and cut bearing edge. Not a problem from this guy.

Table router to cut bearing edges and t-square & drill to for holes for bottom lugs.

The only possible issue here would be if the drums only came with one re-ring,which would seriously complicate things-My Tama Superstars had none,so no issues.

How would converting these effect any potential value (mid 60's Slingerlands)?

Mid-60s Slingys should have bottom re-rings and edges, so the conversion should be easy (as long as those bottom edges are in good shape). Remove the protective trim hoops, layout lug mounting holes, drill, mount lugs, and you're good to go. IMO, it makes the drums more desirable. Concert toms are a hard sell.

Was Slingerland making concert toms in the mid 60's?

I doubt the resell issue with a kit like that would be a huge deal. Concert toms do not sell that well anyway.

I went through this decision process when I refurbished my Rogers XP8's. They came with 10 and 12 concert toms. I ended up leaving them alone and Im glad I did, I like the sound of them and they are still original, well except for the new wrap.

Jeff C

Gene Krupa Jr. set, had 1 Concert Tom (c.1963-64), later "Pop Outfit" was a Concert set (1968-77), (The Slingerland Book,... not always 100% accurate, but a good starting place.).

This is the one type of conversion that I think adds value to a drum, if done properly.

The modern combo outfit came with a 9x10,9x13 and a 14x16 toms,in the 64 catalog.

Steve B