Thank you all!
Here's a price breakdown of what I've spent on this so far, including where it was purchased at and if shipping was included. I'm kind of curious myself to see what I end up having into this. So far I'm into it just over $1,000, which includes many of the large/heavy suspension parts. A new cab, engine, and transmission will likely be my main costs here. I have a line on a cab for $500 and possibly a free 350 Vortec that needs a crankshaft. I'd like to keep the total cost under $5,000, lets see if that happens! I'll keep this list updated throughout the build.
C10 cost sheet
Truck (Free from Neighbor) ---------------$0
Hood (CL) --------------------------------$40
Fender, driver (CL) -----------------------$75
Rear axle (junkyard) -------------------$150
Rally wheels 15x8 (junkyard) ----------$100
Spindles 2.5" drop (ECE w/sh) ---------$350
Axle flip (McGaughy/Ebay w/sh) -------$126
Full Bushing kit (E.S./EBay w/sh) -----$188
Cooper Cobra 235/60R15 front (CL) ---$50
Rear axle brake line (Napa) -------------$11