Cobra Jet Springs

So I've been wanting to start upgrading my suspension a little bit. I was thinking of swapping out the springs but due to having the Cervini C-Series kit, I scrape on everything and I cannot lower it.

Due to this issue I was considering getting the 2008 M-5300-Q Cobra Jet springs. These do not seem to lower the car at all but from my research on here they seem to be just V6 springs all around.

Can anyone give me any insight on this? Is it worth getting these or would this just be a stock spring swap?

My Bullitt (and all Bullitts) had CJ springs in the back and the fronts were almost identical as well. It started out about 3/4" lower than stock but got lower with time. You can count on it dropping the car about an inch once you've driven on them for a year.

I have a set with less than 500 miles on them, 60 bucks and they are yours.

I have a set of "Q" springs. So far, I have only installed the rear springs because I just haven't had time to order the new front struts that I want (strange single adjustable). My car has been sitting on the rears for only a month and there is no drop in ride height. Again, I don't have the front springs installed yet so I can't comment on those.
The part numbers on my set of "Q" springs were Bullitt fronts and V6 rears. Keep in mind that there is more than 1 part number for V6 rear springs (based on options).

I have the q springs on my car and they didn't seem to drop mine at all.