Sorry...I meant you'll have dowel pins in the bearing inserts. My fingers were outrunning my brain there.
Prussian blue is...well here is an example:

http://www.oreillyauto.com/site/c/d...h_N0408_-1_-1&pt=N0408&ppt=C0139

Hope the link works. Permatex makes some and O'Reilly Auto Parts sells it (along with lots of other places). Think of your dentist. If you've ever had a crown installed or had a tooth that had to be reduced in height to keep from hitting the tooth above or below it, the dentist had you close your mouth and wiggle your teeth on a piece of blue paper. Essentially the same thing. The blue left on your tooth or the crown tells the dentist where the high spot is.
Jon
Jon

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end