when i was setting up my 33, as in lowering it, i got some springs where the bottom of the spring didnt sit in correct place, i got horrible grinding noise when turning and going over bumps, i was advised and changed the top rubber and that fixed the problem.
I have also seen an assortment of pans, different height, different angles ect, could a later type 33 one have its hole drilled out to fit your sud pan bearing?
I have been told that sud springs are longer than 33 springs, when you fit your springs, make sure there is no loosness when put together.
I have edited my previous post for you to see what 33 top parts look like
I have these in my shed, if you want i can take some better pics??