While you're at it, Chicane67...
I printed out your spring sheet and have been talking to Betts in San Leandro about some new leaf springs.
The car is a 1964 Nova Mexican road racer, full cage, frame connectors, stock spring location.
Front end - stock upper and lower arms (required), Global West bushings, 700# springs, 1-1/8" swaybar, Koni custom made shocks, Wilwood brakes.
Rear end - 9" Ford with 11" drums, 3.25 gears, presently with some generic 3-leaf replacement springs, Koni adjustable shocks.
Engine - 331" SBC, 300-325 hp @ 6500' elevation, 340#ft of torque.
Tires - 195-60-14 T/A R1's or a Yoko A032R
Weight about 3600#, including driver, navigator, spare tire and parts, tools, jack, 16 gallons of gas, etc. Weight on rear springs is 1750#.
What would be a good spring rate for the rear leafs? Our generic 3-leaf replacements are sagging badly. Thanks.
"For those that will fight for it...FREEDOM ...has a flavor the protected shall never know."
Semper Fi! L/Cpl Edwin L. "Tim" Craft, B Co 3rd AT's, Khe Sanh Combat Base, February, 1968