Trying to figure out the current drop my truck has.

[johnymac]

I bought a 1967 C10 a couple months ago.
It has been lowered, but incorrectly.
I am thinking of a 2/4 or a 4/6 inch drop.
I am trying to figure out what I have now to try and decide which route to take.
Can anyone please tell me how I would tell?
Is there a measurement from the bottom of the fenders, or the rocker panel, from the top of the rear end to the frame?
I figure there has to be away to tell.
I sure would appreciate any suggestions.
Thank you.