69 Camaro Rear Brake Conversion with Mini Tub Kit

[camaro1969]

My camaro has rear drum brakes; I would like to convert to disc brakes.

Details: My current rear set up has a dse mini tub kit installed, complete with offset shackles, rear crossmember support for shocks to be repositioned inside of the leaf spring. The leaf springs have a 2" drop. A DSE narrowed gas tank is also installed.
I have a 12 bolt rear with posi. I have not removed the back casing to see whether it has a C clip eliminator.

Question: I am looking at different options from wilwood to american brand conversion kits. I do need to have the parking brake, and want to know the following.

1. do I need to have a disc brake with a drum combo to accommodate the parking brake? Brakes seen here http://www.wilwood.com/BrakeKits/Bra...o=140-11398-DR

1a. Does installing this add more of a positive wheel offset, adding more back spacing by pushing the brake assembly further out towards the street?

1b. Does installing this kit give me everything I need to convert from drum to disc, appears the calliper attaches to the drum assembly (Refer to image below).

2. I assume that since I have the DSC mini tub kit installed, I do not have to worry about staggered shocks?

3. This is an example of the american brand rear brakes. Will these accommodate a parking brake (i assume no?)
https://www.ebay.com/itm/GM-10-12-Bo...BSw3Iw&vxp=mtr

4. Lastly, I have not fully decided whether I want narrow my rear end (to accommodate larger rear tires), and if I do, does that change anything with the install of which conversion kit i use.