I'll chime in though I have not run those style rims. Tie rod clearance is a valid concern. These trucks were designed when all available tires were narrow/tall/skinny. I know on the 3600s the inset (backset?) can only be approx 3.5-3.75 inches.
You could check this on your truck by placing a straight edge on the face of the brake drum and measure to the tie rod end. Turn the wheel left and right lock-to-lock to find the shortest distance. Conversion to modern style tie rod ends can help.
Look here, towards bottom of page http://droppedaxles.com/CHEVY_AXLES.html and here http://droppedaxles.com/TECH_ARTICLES.html#TXTOBJ7D815453535DE1
Center bore is less of a concern as long as it large enough since the wheels are stud-centered, not hub-centered.

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