Dang, not what I wanted to hear. I am replacing the rear leafs with the Wild Horses 11 pack, so I imagine they would be considered HD. Moog says they discontinued the CC810's in 2014, with no replacement.
It, depends. May be worth a call to see if WH will give you a spring rate on their rear leafs.
Moog did discontinue them, but that range of springs was made by multiple manufacturers. I tracked down a set of old stock springs and got the manufacturer's information from the vendor before I bought them which was like pulling teeth to pry it from them. I called the manufacturer and verified the spring rates and loaded/unloaded dimensions before I bought them. The manufacturer still had the info in their system and said they could make the 810's for me, about a 2 week turnaround. They were $189/set though. I paid pretty close to that for the ones I found though.
It is a shame Moog dropped the 810's as they were really cheap when Moog had them in production. The 810's have a spring rate of 270 lbs and are right at a 1" lift over the 812's. I am sure part of the 2.5" rake I had was that I replaced the gas tank at the same time and my initial measurement was with an empty tank. I didn't remeasure everything until I had swapped the coils for the 810's and filled the gas tank. I am sure the empty tank was about 1" of the rake. I am also running a soft top. I may well find that if the rear springs settle in or I put the hardtop back on that the 812's would be just fine. The 810's definitely ride firmer though.
Lemme see if I can dig out the manufacturer's info. They were extremely nice and the guy I talked to was happy to answer questions and BS about trucks. He had an F100 he was working on.
