Are these bags too small for the rear?

[Fastest32]

I've had these bags for a while and was gonna use them for the rear. I can't decide if I should order 5" drop springs or run these bags in the rear.

I had another thread going about how to spend a little money I got. If these need to be combined sorry for making a whole other thread. I already ordered a track bar just can't decide if I should get springs or try these first.
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