I only get "one" thing to mention!  Probably the Subaru engine transplant, 16 inch tires made a big difference, I thought I'd gone to heaven with a new accelerator cable.  Limited slip differential is definitely high on the list.  If you asked me a different time of year I would probably say the propane heater, getting rid of the stock refrigerator. Boy, hard to pick just one.  There are so many things that can make these vehicles better, and always seems to be one more step you can take.  I guess that's part of the appeal.

Troy