4 Wheel Drive/SUVs: front axel, tsl swampers, dana 44

Question
I recently got and 76-78 f 250! Problem is I dont know what kind of front axel I have. It's solid with a ball a socket! I think its some kind of dana but not sure if you know what this is it would help alot. Plus I'm running 39 1/2 tsl swampers which was already on the truck, but when i  get over 35mph i get a bad wheel hop from front drivers side feels like wheel going to fall off. if you have any ideas would be great help! thanks

Answer
the front axle is probably a dana 44 unless it has been changed. And for the wheel hop, check the air pressure. From personal experience you don't want to run more than 35-40PSI at mostas these tires are very unstable due to the huge sidewall so they will hop if there is too much air