I see. Was it the bolt spacing on the caliper which prevented you from running it on your current EF kunckle? DA6/9 kunckles, i forget which one was avail' in AUS, has the same bolt spacing as...
Above info is correct but you missed out that EG\DC2 shocks are longer on the front. This will give you a very crap feeling, trust me I know. Stick to ED\EF suspension.
If i understand your question correctly. EF9 control arms won't work with DC2R/EG6 suspension due to the eyelet being wider than an EF8/9 unit, not sure about control arm length.. tape measure?
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its not the weight difference that you are feeling in regards to the front and rear its the stroke length. If you are running a DC2/EG setup jack up your car and put the front and rear on jack...