Geez I suck at checking posts new posts lol. Yea and you know very well too that the motion ratio of the shock is just as important too. How much travel will you really gain? I don't know anything about the 4Runner rear ends and with the stock geometry what really would be the ideal shock length. But since changing the shock mounts is easy enough a proper set up 12" shock could be close to as effective as a bypass bolted in the stock location but you could have a couple more inches of travel. However I've never had bypasses so idk what I'm really missing out on haha. My truck works well with how it is set up now. I spent the money on the nitrogen set up so I can revalve myself and I saw that as money better spent than bypasses.