well 40 psi boosted 4x4 launches... mine held up so far. they can take some beating thought. they have after market steering components that are more in the off-roading world. i wouldn't do heims if its a DD cuz they'll wear out quick. unless you get some really expensive ones that you can rebuild. i havent touched a thing on my front end except pitman/idler arm that were already worn from the 6.5l. man i'm jealous you got aam rear, cuz i couldn't find anything cheap so i settled with a rear disc conversion.
joe