[Second Series]

I just looked on Bob’s website, they show the Cable-X, Cable-X site lists it at $340. Dakota Digital is $285, Speedhut is $360. There may be others, this is just from a quick search this morning. I’ll look into reviews of what’s available.
I read a post about converting a ’89 Blazer transfer case mechanical to ’90-’91 electrical speedo, so it may be possible to go the other way. I also read that Dodge used a mechanical speedo on the NV4500 at some point. I have a 5LM60 now, and I understand that is identical to the NV3500 on the outside. If I can get it set up with a mechanical speedo drive, I’ll go that route. I’ll still need the electronic signal. If I have to remove the tone ring, I may be able to get an in-line VSS. Stealth Conversions made one for the 4-pulse system, there are bound to be others. This is partly speculation, I’ll take my time and create a detailed document.
Dan, how about a pic of your son’s truck?
My k2500 is the 6-lug. Does the 8-lug k2500 have a wider tread? I read where someone swapped the 6-lug to 8-lug spindle and modified the upper A-arm, that’s my plan. The diffs are 3.73, the ’88 8-lug rear in the ’47 is also 3.73. I was concerned about how the rear works with the RWAL (Rear Wheel Anti-Lock) system. I don’t see any wires to the rear axle. The schematic show the VSS supplies the signal for that system, so it should be good to swap the rear.