Front coil spring height

[Kenfuzed]

I'm new to this board so apologies if this has been asked before.

I have a 66 C10 SWB that I recently purchased. The PO gave little info but "thinks" the front clip is from a 74-78 Chevy (disc brakes, 5 lug). There are also lowering springs and shocks installed, but no clue what size springs were installed.

So my question is, is there a way to measure the free length of the coil springs to figure out what drop height was used? Currently the front is ~1-2" too low and I'd like to level it with the rear. No clue what springs are in the rear either, so no help there. All of the springs look new so I'm sure it probably came from a kit of some sort, but I don't want to start buying different size springs trying to guess. The front end rides like crap and needs the extra 1-2" of travel added back in.

Below is my new ride how she sits right now.