Converting to c-20

[Jeffp1979]

Hello all, I had been kicking around converting my c-10 to c-20 I have located the front knuckles for $45 ea the rear end with 4.10 and posi for $150 from a local scrapyard that my buddies body shop buys everything from I got a price on upper and lower a arms with ball joints installed and new rotors and calipers, I've got some old 8 lug steelies from an 81 c-30 srw I owned a few years ago, am I missing anything? It seems like something is slipping past me.

Thanks