Auto trans swap

[Caddude101]

I have several questions so I will make it as short as possible:
1. I have install front disc brakes from a 1982 chevy on my 66 GMC. I want to keep it 6 lug so where can I find the rotors and drop spindles to do this?
2. I am replacing the V-6 with a V-8. Do I need to use the motor mount stands form the 82 donor truck?
3. I am replace the manual trans with a Turbo 400 transand I also have a 67 chevy truck that has all of the auto trans and everything. My question is what do I do with the emergency brake crossmember and do I need to remove the original trans crossmember that had bell housing mounts on it for the trans?

BTW I do have all of the manual trans stuff including the trans and a V-6 for sale if anyone is interested.