DIY Wheel bearing?

Not bad at all. I believe the 7 1/4 is a c-clip axle. Jack it up, remove the wheel, brake drum. Remove the diff cover. Pull the c-clip on the drivers side and simply slide out the axle. I don't believe the bearing is held in place with a retainer. You should be able to slide the bearing off with a little heat. Or if it stays in the housing you will need a slide hammer to get it out.