help with figuring out a what r/c is it

[grim digger]

well the guy i got it from already did some drilling in the chassis near the edges where the side guards would mount,at the moment i'm working on the engine,and mounts,but will get to the rest slowly to check,clean and replace or relube the diffs,and check the other suspension parts to see whats still usable and what needs to be replaced most likely a complete screw kit and some lube and i think pretty much it should go together nicely