Brakes/Front wheel bearing seal questions

[May70]

I have a 70 c20 with 8 lug wheels with drums all around. I wanted to check the brakes so I proceeded to check them.... Came across a few things I have questions on. Some more background... My hubs are rusted together to the drums, so they came off together on both sides. These front drums have two screws in each side to hold the hub against the drum I assume, I am told it was mainly for assembly purposes. Havent got to the back yet to check those brakes.

A) There is no plug, hole or anything that resembles a punch out hole on the drum or on the back plate to get to the adjuster (to back the breaks off). The drivers side was a pain to get loose, beating, then prying to get the drum off the brake shoes. On the passenger side the brakes weren't touching the drum and it came right off. How do you adjust these things/ back off the shoes to get the drum off typically???

B) Wheel bearing seals are giving me grief on both sides. I decided while I was checking the breaks I would check and repack the bearings. Outer and inner bearings were fine, cleaned them out and repacked them. Getting the inner bearing and seal out, I simply took off the outer bearing and put the nut back on, then yanked the drum to get the inner bearing and seal to pop out. I did not check to see if that seal is supposed to sit flush with the flange (Does anyone know ???). After packing the inner bearing, setting it back on the race, when I try to put the seal back in it REFUSES to go in evenly on all the way around. I cleaned of the race and there are no burs or anything. Tried again with a piece of angle iron over the whole seal, gave it a few taps, one side always wanted to pop out, gave it another good tap in the middle and it bent one side of the seal.... I have never had any issue with the seal going in before and I have done these probably 3 or 4 times on later models. Out of frustration I took the hub with the bearing and other seal over to the press. I have a round piece of alum stock the same diameter as the seal and started to press it in. It went with some hesitation and before I knew it I mushroomed the seal. So now I am waiting for the parts store to get in two new seals and don't really have any idea how far in they are supposed to sit or why they were so hard to get in evenly. In case I got the terminology wrong Ill put a diagram up. Red arrow is the bearing, orange is the seal.

Tips/info would be VERY HELPFUL, hoping not to bend two more bearing seals. Thanks