1992 Marin Eldridge Grade, 2007 Kona PHD and 199? Trek 1000 (current build project)
Ahh, LOL - 'dishing' is adjusting the spokes to make wheels go 'in' more on one side to make space for cassettes etc..
I think your problem might be solved by screwing everything back onto the axle, making sure that you end up with the same amount of threads showing on either side of the axle when it's mounted on the bike.
You have to 'lock down' the bits on the drive-side (where the gears are) and *then* put the axle back through the hub to put the rest of the bits on, but don't tighten the locknuts down until you've sussed out the spacing.
You're going to have to make sure that the bearings are dialled in right when you do this as well.
The drive side of the axle is the one with less threads on it.
Well i finally got a working contraption from bits and pieces laying around and some new derailleurs bottom brackets shifters
Only thing i want to add is a new set of brakes & new chainset as these are old used crank just to get it in working order new freewheel and chain so no point keeping an old crankset
Decided would be too expensive to convert to freehub so just got a new 7 speed freewheel cassette