In speaking with Richard, he said I'd probably have to have some axles made up.
The yahoo conversion write up used original VW bug axles. The stub axles are spaced inboard almost 1 inch, maybe this makes up the difference? There are many different vw axle lengths, auto transmission has 2 different lengths, and then there are grease rings, which add maybe 3/8 inch. Hopefully there will be a combination that will work with out having axles made.
Once I have the hubs machined, so can fit into carriers, and have engine - transaxle mounted in frame, then can accurately measure.
BDA, you are using Lotus stub axles? You have a universal and CV joint on each axle?