HELP!!!!Put in 8 3/4 rear and it vibrates real bad

I don't think it's possible to get the bearing so far off that it tweaks the axle that bad (where you could see it)

A person could run it on a stand with the wheel and drum off also.
That way you can check it right at the axle flange as see if it has runout.

Just throwing ideas out there, I've never installed the green bearings, I prefer the factory rollers.. You're most likely correct, but if the wheel is wobbling somethings whacked for sure.