I would be willing to wager that the B has infinitely more power the the Oliver.
I used to tractor pull against them when I was younger. 77's were amusing how they could go from WOT to their knees in about 5 feet. I was halfway cheating though, my WD-45 weighs the same but left the factory with almost twice the hp.
HOWEVER, for giggles I put a tape on the block of the old girl to see if she had ever been rebuilt. And rebuilt she has been.
Factory is 3.3125", mine is a hair over 3.5"... which is a lot. I see a Super 77 is 3.5" bore. Researching to see if you can even put S77 sleeves in a 77 block and it looks like you can.
Kinda neither here nor there, dad says whatever it was while it ran great it was no powerhouse. I think he is kinda stunned it has been whooped up...
My B is a "middle" B. 1946 twin stick all fuel, pretty much every option but auto steer. Even has the hydraulic update. Based on my past experiances it would be close but I don't know if the B would win. Sure I got 6 gears but only like three are really usefull, they are pretty much all variations of "too fast". A later single stick B with a pressed frame I think would reliably take a 77.
But they are incredibly smooth running and comfortable. The next size bigger, the 88 is a force to be reckened with, especially if it was a diesel.
more low end tourque anyways. The oliver has more gears, at least I think that one is a split H pattern. Not sure if that B is just a 3-speed or if it has a hi/low lever. My dad had 2 different “A”s, one was a 3-speed flywheel start & the other he still has is a ‘49 with the hi/low & electric start. Hard to beat the old twin-cyl deeres, the A is a bit thirsty on fuel though. 321 cid out of 2 cylinders. 980 governed engine speed. The B runs a bit more rpms, 1200 I think.
The B pretty much runs on air, by far the most economical on in the fleet. B's ran a little faster and had more compression than the A.
Nice evening, let the big chickens out to play. They are loving the new grass coming in. One caught a mouse somehow, never seen that before. eww.
When we were kids we saw one find a toad. It was straight up Jurassic Park. So we did the right thing and found them more toads.
A couple years ago the ducks found a mouse nest with baby mice, that did not go how I thought it would. Same end result as the chickens but they didn't get ripped apart.