[82-300TD(SD)]

I just bought a 1982 (Model Year) 300TD with 360,000Mi. The Engine and trans. were traded from a 1982 300SD with 140,000Mi. The owner did not set up the speedometer cable because he said there were mechanical/electronic differences between the TD/SD trans. Any tips on how I can fix this before I loose track of my milage or get a speeding ticket :?:

 

[82-300TD(SD)]

Would there be a length difference between the speedo cable the SD and TD use?

 

[82-300TD(SD)]

I have found out that the transmission is actually an SD trans with an electronic speed sensor. Where can I convert my mechanical speedo to electronic?

 

[82-300TD(SD)]

Would a gauge from a salvage SD be straight "swappable"? Would I need shielded wires between the gauge and the trans?