1966 GMC K10 questions

[Gary66]

I have recently bought a 65 gmc k10 swb Fleetside . I was wondering if anyone had any idea of production numbers. The vin is K1001PF2098A. I have researched the vin and such, but I'm curious to roughly how many were built..... Previous owner said there were right at 100 built specifically for the colorado forestry service, but I have no idea. It is original frame but the v6 has been replaced with a 454 and automatic. I had also,heard that all the production number information was in a fire,as well......anyway.. Any help would be appreciated.