Chances are the rotors are just a little rusty and wont let loose. Take a rubber mallet and beat the crap out of them to knock the crud loose. Also, the park brake shoes inside may be seized up, so be patient with it and eventually they will come loose. I dont know anything about the riddler covers. For the drive shaft flange, I ordered a spicer adapter for a 1310 u-joint (I think)
check out my sig, I did a write up on my install and have a parts list with prices in the first couple of posts. If you read through it, read carefully about setting up the pinion angle and learn from my mistakes.
Good luck and have fun.
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