AZhitman wrote:No.
Springs are made to work together, you'll have different spring rates F/R which will negatively impact handling.
How much can the subs weigh? Shouldn't really impact ride height unless they're massive (and plenty).
Correct, if you put the stock springs in the rear you are going to create a HORRIBLE push condition (understeer, alot of it).
Not only will you decrease the rear spring rate which will cause the car to want to understeer more, but you are raising the rear which loads more weight onto the front wheels, causing the car to load the front tires more and cause understeer.
If the subs weigh a solid 50+ lbs. they can effect the ride height, especially on softer suspensions like the one your running. However it won't be but by a few tenths of an inch.