spring weight chart

[X33RS]

Who wants to run the math on the spring weight chart so I can double check what I'm doing?  I'm not sure I'm coming up with an accurate number.

69 Z28 with rally sport package.  Console and gauges.   Flat hood and no spoilers, no power steering.  These things I know for certain.

I can't be certain on things like which radio it came with, whether it had floor mats, which battery it came with, or if they consider the original Z radiator HD cooling.

So when I run the math I just assume it had an AM radio and I don't use any of the other options.  I come up with 62 lbs.  Close or am I missing something?

Much appreciated