There were two different companies that made ECUs for the Vanagon during a
few years in the 86-88 range.  Bosch and Triumph Adler.  The Bus Depot
probably has two different part numbers just to be sure that if you have a TA
unit they get a TA unit back as a core and you get a rebuilt TA unit.  Same
goes for Bosch.  Any ECU from 86-91 will fit and work and are interchangeable
(TA for Bosch, 022 and 022D).  Just FYI.  I have put TA unit in my 90 GL with
no problem (originally had the 022D Bosch unit).  Also put the 022D into the
86 van I had at one time.  Again no problem.

I have rebuilt Digifant ECUs ready to ship for $200 (again FYI).  I don't
charge a core charge up front either, I just ask that you return your core
within 30 days.  These ECUs come with a one year warranty.

Thanks,
Ken Wilford
John 3:16
www.vanagain.com
Phone: (856)-765-1583
Fax: (856)-327-2242