Thank you Neil I will be in touch with you this coming weekend I'm out of town working rite now when I get back I will get some measurements and contact you.
Here are photos of these axles. They are forged 4340 made by Summers Brothers for a Porsche. I don't remember which model Porsche it was ( I think it was a 934 or 936?) but he said that they were spares for Daytona. The splines are 31mm dia, 28 splines, and the length s are 17 5/8" end to end. These are a pair, of course. Offers?