Eaton and 30's is the way to go. The stock posi is worth money to some. Just needs clutch packs and someone will buy it all day long. Hope you aren't on stock axles, back in 2006 I broke one at BMP, twisted them bad, and my stock trans yoke and output shaft was twisted as well. PST in tampa area makes a great driveshaft with 1350 joints front and rear. While you're doing the rear, upgrade to a 1350 rear u joint.