speedo conversion
Sometimes you can get a new tailshaft for your trans that has the mechanical output. Also both the T56 and TKO sell aftermarket versions with both mechanical and VSS output.
http://www.jagsthatrun.com/4L60_Order.html
Neither option is cheap either.
Unfortunately Cheapest option is going to be electronic speedo.
If like me and you really want to keep the stock speedo you can try taking the guts out of an electronic unit and put it inside your stocker. Not an easy or again cheap option.





