Rear drum brake upgrades?

[Malibu 361]

Ok,here goes I am converting my car to Wilwoods Dynalites up front and changing to a Wilwood manual brake master.My question is what can I do to upgrade the stock rear drums on my 8.5 or will they be fine left alone?
*Aluminum drums are they worth it?
*Is there a better spring kit?
*What kind of brake shoes?
*What kind of wheel cylinders?

Right now I am running a MP rear disc brake conversion with the El Dorado calipers but was told that I would have issues running that kit with manual brake (not enough pressure)and I was better off changing back to drum with C-Clip eliminators...
And whatever else I am missing out on ,thanks very much ......

 

[dwkohout]

Regardless if the brakes are power assist or manual the master cylinder can create way more pressure than could possibly be used on the rear brakes.

 

[BillySS]

Aluminum drums not worth it, cant get a new set and most are cut down too much. I run soft compound shoes and high boost wheel cylinders and my car stops on a dime. (you've been in it) In the front I run SSBC 2 piston calipers and drilled and slotted rotors.