I don't know if I'm just dumb or what,but can't seem to understand formula's. And I've been getting all kind of conflicting advise
This is what Eaton told me
The HD Corvair spring has a rate of 188 lbs and the lightest M2 spring has a rate of 308 lbs. Cutting the M2 would increase the rate. So useing an M2 spring is not an option.
Now what realy causes you trouble is replacing the Corvair spring. I have looked over the specs of the nearly 600 coil part number we have and none of them even come close to what would work for you. We have not made any for yeas. And I do not know anyone who is making them. We have had some calling for them but not enough to justify making any. We need to make at least 50 springs to get the price affordable.
I told them it was not a corvair,but a 26 T with a 350/350 and thats what they came up with