to hand? how wide is it? Perch width 34”, 1935-40 Ford, Use with axle au- 2107 n 34'' perch width is this spring 35 inch wide 2'' thats a ce front spring, now is it a fs 3540 = 38'' perch 39.5'' WIDE a fs 3540 fb 36'' perch - ABOUT 36'' WIDE? or what I want a FS-3540EAN ford 34'' perch ABOUT 35'' WIDE there is a part number on it but it doesn't relate to any of them...…...
Heidt’s went a different direction with the CE line when they bought it. They have concentrated on IFS and rear leaf suspension systems only.
I once worked with springs. 35-40 springs usually run pretty flat. What you can do is measure eye to eye along the bottom of the main leaf. I think the shackles are 1 1/2” like 32-4 so when they are at the 45*, they add 1 “ a side so add 2” The spring dimension and the 2” should be the design mount width.
I have a CE front spring FS-3540EAA it measures 37" ctr. to ctr. following the curve on the main leaf, and 35 5/8" straight across ctr. to ctr. of the bushing holes. This spring is new never installed. Also I have a Chassis Engineering from 2004 if you need more information.