I had 6v53, 3-71, 4-71, 6-71, v6-71, and a 6v92.
I believe redline on a 6-71 in trucks was 2,100. I heard an old truck drivers saying that you need to bump your shin and head getting into the cab....then get in and wrap/beat the piss out of that Detroit....
Back in the last century the only tractor we had was 6-71 powered Binder 2000 with a 10 speed. Bought a heavy rock Crusher in Du Bois, Nebraska. Planned on going over one day coming back the next....too long of story to tell, but 3 or 4 days later came out into Iowa from Nebraska City on hwy 2 with a load over 120,000#. Up comes this bigassed friggin hill. Kept shifting down, finally hit 1st gear which ain't very low in a 10 speed....rpms kept dropping, oh shit.....below the power range....was afraid I was going to be dead in the road, but somehow limped over the crest of the hill....what a relief. Not nearly enough hp for the load and definitely not a tranny with a low enough gear. Another escapade of getting by with what you got. Couldn't afford a real tractor. Didn't take enough warm clothes and walked out the bottom if my cowboy boots. This is the kind if stuff I dream about at night....