Front spindles Center line question.

[ChevyRacefan]

My Truck is a '71 with disc brakes, 5 lug 2wd.
It is already "seems" low in the front. Still a bunch of space between the fender lip and top of tire, but that might be the function of the 26" tall tires.
But truck looks lower Than I'd think a stock 70's truck would be.
So my question is, a stock front spindle Where is it in relation to the knuckles upper and lower mounting/ball joint.
I am trying to figure out if someone already put drop spindles on it or not and not sure how to tell a stock knuckle from a dropped knuckle/spindle As I don't know what measurement the spindle center to upper ball joint mounting flange would be stock, and/or lower ball joint mounting flange to spindle center .
Thanks.