how can I tell if I have a $E6 or a $EE?
You do not have $EE. That is from the 8051 ECM used with LT1 engines. The ecm is completely different.

BDJZ is $E6. Go to google and type BJDZ site:gearhead-efi.com and you'll get good results.

The 12 Ohm injectors could be used but there are a number of values that will need to be changed including the injector corrections and fuel flow rate.

If the calibration you're using can be set for non-electronic transmisison then you may be able to use a simple park input.

I think the wise choice is to get as much as possible from the junk yard truck.