I'm toying with the idea of buying a "fully restored" '81 BJ42 and am wondering what the pro's and con's are of owning a diesel this old and this rare. Are the parts impossible to find if something goes wrong? How is the performance of that diesel being a 4-banger? I'm familiar with diesels and have owned a Cummins TD and loved it, but don't know jack about the ones in Toyota's. What is a BJ42 in very good "restored" condition worth?