Blazer carpet kits

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I am looking at buying a carpet kit for my 71 blazer. Have been shopping around and found best deal at auto parts ware house acc carpets are $256 plus free shipping and i have a -$25 coupon. The issue I am having is it says carpet kit. No pics, or part count should be 4 front rear and two wheel wells right? Other issue is cst or not? What wouls be different with or without on carpet? Here is part number i was looking at 10187-71-82-01. Any info, help or derection would be awsome. Final price is $231 and free shipping so bonus just not sure if its the correct part