Coil Spring Rear End Suspension Cup Bolts & Washer

[68'CTown]

I was installing my coil spring rear end on my 1968 Chevy Truck C10 last night and ran into problems with the coil spring cup bolts and washer. The reproduction coil spring cup kit that I purchased came with hardware. My dad and I tried to install the coil springs and cups with the reproduction bolts but the problem was the bolts were to short were they wouldn't catch to the cup with the nut on it. Lucky my dad tells me every time to save everything that I take off my truck. I had the original bolts for the coil spring cup and there was a difference in size. Here are some pictures to show you want I mean.