I went with a 10:1 cometic shim.
Install yourself? Depends on your skills and ability to learn and problem solve for your self. Also it takes a LOT of time, pretty much dismantle the entire sled to get at it, know how to set your cam timing, pray you dont lose a part in the engine while getting the timing chain off, etc.
Experts do it in 4-5 hours it would take me honestly probably 12 hrs.