I see your point in regards to the frontal area, but is there any benefit (under vehicle air flow) of having the vehicle slightly raked?
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The rear springs and struts that I just installed were from my parts sedan. The sedan's springs are softer and rated at 200lbs less than the wagons. The vehicle should be sitting slightly lower in the rear than with the factory wagon springs.
I had a couple escort wagons previously, and in the one I had both front and rear lowering springs installed (set). It seemed to be lower in the back (sag) than the front. I would think that having the vehicle (even slightly) lower in the back, than the front, would be very detrimental to air flow...well, they were cheapo springs...
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Thanks for the tip, I didn't consider that it wouldn't decrease (and maybe increase) my frontal area. I will install the fronts first and if it isn't even, I will also install the rears.