2:73 ratio in my new Blazer??

[Patriot]

Well fellas I bought another K5 Blazer. It is from the Coal Mines in Gillete Wy. Bought new and sold by the Coal Mines. Its a 1986 4 speed with the 208 t-case. I looked at the RPO codes in the glove box and it says it was special ordered with 2:73 gears. I also found the original papaerwork and it says it was a special order package, quad front shocks, 2:73 and some other stuff. It is a plain jane truck. It even has A/C. I thought that was odd for a 4 speed truck. Do you guys have the Ratio/Tire size/ RPM chart?? I need to fiqure out what RPM it will be turning with the factory 31" tires. The motor is froze up because the Mine ran it out of oil. I have a nice motor on an engine stand that is going in it. Anyway thanks guys again for letting me pluck your brains a little.

Patriot