Your B21F engine with a white distributor cap should be a K jetronic. This is what I have in my 82. For this engine to work someone had to go to alot of toruble to do a major rewiring to get the engine to work. by the way your diesel has heavy duty front springs (to handle the extra weight of the diesel). If you ever what to change to a V-8 your way ahead of the game with the heavier springs.

I bought my 82 new and the engine has been very reliable. The only major problem has been with the wiring harness going to the ignition module. If you what more information on this issue then E-mail me and I will give you all the details on this little gem.