When I replaced my shocks with new Koni's I did not use a spring compressor and did not remove the exhaust, etc. I did, however, remove the sway bar.
I do recall having to put a little weight on the rear wheels (as if I was lowering the car back onto the ground) to get the right angle and get everything lined up. I do not know if this is he "right" way but it worked for me.
Hope this helps.
Devin
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