I have an 86 mechanical speedo, LG4 computer carb.
Swapped in a 95 T56.
If I get an electronic speedo from a later model, '90 up?, will the VSS from the trans interface with the speedo or does the computer do this?
In other words do I also need the computer from the electronic speedo donor car?
Or
Does the electronic speedo just read from the VSS?
thanks...

For future reference:
Yes the Dakota Digital unit reads directly from the VSS on the trans, ECM is not needed...