[MAStuart]

Rustyrims Thank you. I have that drawing from AC. I have several different drawing. Unfortunately there is more than one length of spring. If you change the spring length by only 1/8 inch it changes the camber.

Larry Yes what you said is true but those alignment specs might not be ideal for street and open track. Weight will affect ride height and that will change camber. Tire dia will change ride height but not suspension geometry. I doubt 2 ac cars built one after another had the same alignment specs. Close but not perfect.
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I got ahold of Kirkham asked about a rear spring. They said they got some in and would sell one. $995.00 Plus Tax and shipping. They could not tell me the flat length. The flat length is something I need to know. They caution against using a nonadjustable lower control arm and all the pitfalls of them. They also said they have sold some springs to guys with original car that were used with some success.

I cant take a chance with a spring that some say will work. I have to have one made to a length that will work on my car. How close is my build to an original car? Who knows how close my plans are?

Now if I could only get a simple answer to these two simple questions.

1 Can anyone give me a center to center measurement between the rear shock mounting bolts? Needs to be an original type car and on its tires, like it goes down the road.

2 When an original car is sitting on is tires. That is the shape of the rear spring? Is it fairly flat, curved upward, or curved downward?


If I can get the answers to these two questions, I can figure a spring length that will hopefully work. The spring length might even end up being the length mentioned in the cobra manual or one of the many different drawings out there.

Thanks again guys! Hopeful to get the answers I need!