1994 TBI 5.7/4L60E swap to a 1967-72 C-10?

[Dasani]

I have recently purchased a low mileage 5.7 TBI motor from a freshly wrecked 1994 Blazer (1500) with all the accessories and the computer. I’d like to install this engine along with a 4L60E into a 67-72 truck. I think I have my head around most everything I’ll need (fuel, spark and cooling to start with) however, one thing that I’m stumped on is the speedometer and speed sensor in the transmission. My question is has anyone done this kind of swap and or know of a reliable source for this information?

Dasani