AFAIK the SS in 1994 had the standard rear springs for a shortbox 4.3L truck. The ZQ8 lowered suspension started in 1996.
The lightest rate springs for 94 and earlier appear to be 1100#
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1995 and later offered a 995# spring. Those might work in your truck because they are 26/28" springs. Starting in 1995 Blazers got different springs than the pickups and 95+ Blazer springs won't fit your truck because they are shorter, but the 1995 + pickup 995# springs are the same length and width as the 82-94.
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