Okay I tried to ask on JU but they wouldn't let me post.

So I screwed up on the original coil install and I want to rotate the front DANA 25 axle (I know...throw it away - I'm just testing the suspension 1st and will install 44's this winter.) to set the caster and need to know what/where the measuring surface is.

Check here (http://www.pirate4x4.com/forum/showthread.php?s=&threadid=48833&highlight=caster+and+measure) for a good post on how to measure. While the exact method descibed may not work for your M25, the principle is the same.

Alternatively, you could stick it on an alignment rack to get your readings.

thanks