Going to be tough finding a copy of a car similar to yours for the front and rear springs
Would suggest that you
1- find and include the engineering number from the rear springs so that someone with a differently optioned car but with the same springs can offer usable help.
2- Measure the front sway bar so that others can provide marking info from other applications but with the same sway bar. (my guess would be green/yellow)
3- Driveline markings could be taken from another 390 automatic (X or S) built at the same time so you'll need to provide when the car was completed from a Marti report.
As mentioned above - finding your cars buildsheet will answer a fair number of your questions and will eliminate questions and reduce guessing
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