[cdan34]

Al, I looked at my invoice and the spring I ordered from Speedway was #580-3536 and the invoice says it's for a 35-36 Ford rear. I don't know if it's a misprint or that year is the same as 41 but I do remember measuring between the center of the holes it was 46 1/2 and the spring they sent fits fine. The car is a '34 with 41 rear and it's still going through the build, it's on blocks and I think it will lower it just right.
Chuck