While the diesel Traveler was down and awaiting parts I decided to install a hydraboost unit and a Delco alternator. The first alternator I installed in place of the Hitachi alternator was a 63amp Delco 12si. I had to file off a lot of metal from the bottom of the adjusting arm but nothing to serious. For my mounting bracket I basically used some plans that were previously posted on the web site - Diesel Forum. I used the plans posted in this thread as the basis for my bracket. Instead of flat plate I used angle iron and some 1/4" plate. Thread that includes an alternator bracket plans: http://www.binderplanet.com/forums/showthread.php?t=3311&highlight=delco+alternator Another thread that has a different bracket design: http://www.binderplanet.com/forums/showthread.php?t=34193&highlight=delco+alternator After fabricating a mounting bracket everything looked good except for two really minor points. The top of the adjusting bracket ended up just touching the lower radiator hose. Some additional filing on the top and bottom of the adjusting arm cured this headache. Also, doing some reading on the BB diesel forum, it seemed that there were some on here that were a little disappointed in the inability of a Delco SI alternator to charge at low speed or idle on the SD-33 diesel engine. So that got me to thinking some and since I was still waiting on parts and such, I decided to experiment.