You'll have a hard time using only the EZK w/o LH, I suspect.

Without a doubt, you want a turbo ignition system. The n/a ignition will run way too much advance under boost, I believe. I haven't played with it, but I know someone who ran the n/a chrysler ignition on an '88 with a turbo, and it was dreadful.

I know you mentioned an interest in timing adjustment. But if you'd like to monitor knock and save the engine from possible damage, you could get something like this. It's more useful when running an EMS like Megasquirt that can pull timing for you, or when tuning MS and you need to adjust the ignition map.

http://www.viatrack.ca/

http://forums.turbobricks.com/showthread.php?t=43639

Other options are a full swap to LH/EZK. Or the Saab APC system, which used to be very common, but I don't see many people messing with that stuff anymore. It does work though, from what I understand.
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forums.turbobricks.com
Parting out '84 DL auto, many cheap parts available