Admittingly the RC/SB is ugly down in Florida we call it mexification but I do think it is a legit 2500 (swap at least) as its running on 8 lug running gear

 

I have seem plenty RC SB 2500's around here with cummins. I did not know they were so rare. Hell the other day i saw a 3500 RC SB with a cummins. Would make a sick drag truck.

 

I guess it just depends on where you live the only ones I have seen are conversions or long beds, I guess it's like the crew cab short bed cummins 1st gen Rams; I know where I am at it seldom you find a diesel with a manual like mine

 

2500's and 3500's never came from the factory with regular cabs and short beds... at least not in N. America.

 

I see a red one around here all the time, ill snap a pic next time i see it.