OK.  I'll measure the 22RE mounts against the 2RZ/3rz (2003 Tacoma) when they come in.   22RE mounts are new:
22re mounts are 2" from the back side to the top (no cover plate).


Chilkat / Alex / Tungsten ? has gotten back with us and is checking current mounts against previous versions, so we'll figure out of something changed over time or if something else is going on...   I'm done with tthe mounting part for a while until the 2rz mount comes in.. In the mean time, like Ryan, I've been trying to come up with the right combination of shims to make this thing work (if possible).  It may come down to cutting the up or re-fabricating - hopefully we'll get something fixed up on the existing mounts...