208 t case behind a 4l60

Hi I have a 97 s10blazer with a 4.3 and 4l60 combo. I am trying to run a 208 transfer casenbehind this but have run into the issue that the 208 has a mechanical spedo when I need a vss electronic style has anyone made this swap successfully? Looking to get this truck on the road soon and I'm alittle lost on how to do it. Please post links to any parts successfully used........I do not care if I keep or losse my speedometer as Long as I can shift my trans