You're gonna need a 6" lift with Torsion Keys and spacers from what I know. Go with 35's 6" lift, and get rid of a little plastic to keep from rubbing. The 37"s and keys will be fine, but you will need new ball joints all the time and your half shafts will hate you.
37's will look good if you raise more than 6" otherwise go with 35's and save some cash with replacement parts.
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And i'm sorry about your truck... Glad you're alright and into a newer ride.
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You'll need to omit the autoride system. Have the new shocks installed and bypass the old electronic connectors with some resistors. Otherwise, you'll have orange lights on your dash.
Let me know if you need a source of the resistors, i'm sure I can find them.
They trick the electronics into thinking everything is kosher. No lights.