I have seen these springs referenced as a taller replacement for the Aerostar CC850 springs. I see that they have an installed height 1 1/4" taller than the 850's, which is what I need. The Fatman dropped spindles and the Aerostar springs have my 55 too low for driving. I see that the rate on the 851 is about 25% lower and the load is about 30% less than the 850. Does anyone have any experience with these springs?
I can't help you with the CC851 spring, but I have the same situation/parts you have and I need a little lift in the front. I'll be watching and hoping to learn something. Thanks for doing the research.
EZ solution several guys have used is right here just pick the thickness you need: http://www.energysuspensionparts.com/universal-coil-spring-isolators.asp (P.S. use the part numbers and order them from your local Autozone and pay no freight usually next day from their warehouse.)
Unfortunately I already have the 7/8" thick ones. Well changing springs showed me to be wrong about which ones I had. I had have the 9.6108 which only raise it 5/16". I will use them with th CC851's also. I hope to gain the 1 1/4" of height over the 850's. I will post results.
I got the 5/8 ones the front end shop said if i used them it would raise the front end 1-1/4 you might check with your front end shop an see if this is the right info i have part no 9.6120 summits no is ens -9.6120
I think Don Allen aka rustyfords installed some a while back using the CC850's and posted some before and after Pics,maybe message him. You can also find him here: www.1954ford.com
I was going to use the CC851 springs in my '59, they're probably a better all around better spring than the CC850 with a softer spring rate, but still above stock. I'm using stock springs minus 1 coil so I'm happy for now.
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