Ron, I owned a 91 Automatic Westy for ten years. Absolutely loved it, except for the lack of acceleration. At 3600 pounds, it's no wonder! It is a great vehicle, except it is slow. Handling is ok, not great, brakes and ride are fine. Utility is high, as is fun. Great heat(two cores, front and rear), great AC. Mine even had cruise control, set at 72 and leave it there, no faster though! Drove mine to Georgia, Vermont, Lake Placid, all over. Never left me on the side of the road, put 70 or 80K on her.
At one point, I was going to Subaru it and tow my Spyder but I changed my mind. There can be rust issues and certainly motor issues. If you get one that's running well, buy it. If the motor craps out, put in a Subaru, it will be cheaper and more reliable, get better power and mileage than the OE motor.
Stay away from the inline 4 conversions, they vibrate!
Put in a set of Bilstein shocks, and change out the 14" wheels for some nice aluminum 16". MAJOR handling improvement! You can get shortened springs too, but I have no personal experience.
Absolute best combo would be the EJ33, a 3.3L flat six from the early 90s SVX model. 230 hp factory! Yes, it fits!
Sold mine on ebay(great deal for me!), I stopped camping.