What are your ideas in installing new standard MOPAR rear springs @ 200 bucks a pop vs JC Whitney's 2" to 4" increased ride hight, six leaf after market unit for 112 bucks each? Will the cheapos hold up longer than a year before sagging?

How will a lifted rear end effect the front end alinement? Presently my sagging Dart looks like an old Chris Craft struggling to get up on plain.

JC Whitney:

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC