o scale mk5000c

Again, what are you referring to?

morrison knudsens mk5000c

OH. Well you might try capitalizing company names then. At any rate, no manufacturer has made that model in 3-Rail SCALE.

To my untrained eye (and I'm probably wrong), it looks like to build this engine, all that would be required would be a donor SD70M body and a scratchbuilt nose, along with a few detail parts like grilles, if you wanted to scratchbuild it. I don't know how, or where, you would get a sound file. 

These units originally has Caterpillar prime movers (pre EMD purchase).

I believe they were later rebuilt to SD-50 specs.

Wow, a locomotive with a pair of 6-sided front-windshields. I thought the 5-sided windshield on the SD70MAC had too many sides. I am beginning to wonder if there are any locomotives out there with 7 or 8 sided front windshields.

These are just my opinion,

Thanks,

Naveen Rajan