What size Spring for 37-41 axle?

When building a conventional style rod, what transverse front leaf spring size do you use with a 37-41 Ford I beam axle using batwings and thru the axle perch bolts? Mine seems to be to short... Mikey

 

posies makes one...
i cant remember the part number but its on their site...

 

Measure the center to center distance of your spring perches and call Posies. They will tell you the spring length you need.

Frank

 

I was planning on buying the 31" Speedway spring, shackles and perches to go on top of a '37 axle I'm planning to use next. I just based that on a quick measurement though. I'll be interested to see what the smart kid's say.

 

For spring on top it's 33 1/2" and Posies #1009

 

is that eye center or end to end or ??