I used springs from a '55 first series. The hole is exactly centered in the spring. This leads me to believe if the earlier spring were reversed, the hole would be too far aft.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.