What rear springs should I use in my 95 Caprice LT1 need some help with this

I hava a 1995 Caprice with a lt1 . It has a large system in the trunk that I would say is a sexta 450 -500 pounds. It sat fine with 22"s on it {All my cars have 22"s lol) Well I put on some PMT FABRICATION 91-96 B BODY EXTENDED REAR TRAILING ARMS and the car is now siting about 2 1/2 to 3 inchs lower . What rear springs shoud I instal to get it up about 2 1/2 . Thank you

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SEO springs from a 89 or 90 9C1. They are Linear instead of progressive rate.

booth9C1SS wrote:

SEO springs from a 89 or 90 9C1. They are Linear instead of progressive rate.

X2, or wagon rear springs .