I really love these old slide action .22 rifles.
Here are a couple photos of a Model 90 Deluxe .22 wrf upgrade that I built. I actually bought the donor gun from Bill (the OP). He sometimes sets up a very impressive slide action rifle display at our local gun shows.
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This gun started as a standard late model 90 that had a great bore and rust/put free metal. But it had a pretty badly broken stock that also bent both the upper and lower tangs on the action. I figured that since I had to straighten the tangs anyway, why not make a deluxe out of it. A new buttstock was made out of the perfect piece of wood (in my opinion), and all metal parts were polished out and blued. The original forend was kept as is.