Your post states that your truck is a C10. C10's have 5-lug wheels, correct? I know you already know this, since you state that you'll need adapters -- the Tahoe wheels you're talking about using are 6-lug. I went through this a while back looking for adapters to go from 5-lug to 6-lug and was unable to find ANY that would adapt a wheel that has a 6x5.5" bolt pattern like your Tahoe wheels to a 5x5" hub like the C10. I called several companies that I found online that make adapters, and they told me the bolt pattern measurements were too close together to be able to drill the 6-lug pattern correctly.
Don't get discouraged, though. You might have better luck than I did in locating proper adapters.