In a message dated 12/20/2010 2:51:03 P.M. Eastern Standard Time,
tdiguru@WESTYVENTURES.COM writes:

I had a  question from someone who would like to use one of my TDI starter
adaptors on  a Type 1 - based custom. I have no idea whether a Vanagon
manual-trans starter  will fit a T1 properly, but if so my adaptor should work.
Anyone know the  answer? Thanks,
Karl

hello Karl  Helps to know what year.  If late bug which is 12V  200mm
flywheel , then you have a 50% chance , teeth are the same and diameter is  also.
question is depth and if it clears the body.  later mark  d