[66_Cat_Jon]

I have a 1966 Catalina with a donor 3.42 posi that I was told came from a 1968 full size. It's been under the car and operating for many years and it never bothered me that the 66 spring bottoms are much larger than the round anchors on the 68 spring perches. But now it does bother me, so does anyone know if I can use 68 full size springs for this setup? Will springs for a 68 have the appropriate spring rate and height? Will the top of the spring fit the 1966 body? Thanks for any information anyone may have.