Super Stock or Stock Style Leaf Springs for my 69 Barracuda.

V-8 cars came with 5/8" bolts, slant 6 got the smaller ones. If you have an original v-8 car, you are good...
Ummm, I'm pretty sure all A-body front spring bushing bolts were 1/2" .... at least that's all I've ever seen ! Even on my 70 340 swinger ...