Im a 68A, I've been in for three years and my reenlistment is coming up soon. Im really interested in reclassing to 68wm6. Im SPC(P) and I want to know a couple things because my reenlistment NCO does not know a thing. What are the requirements to get in the 68wm6?
When I reenlist for the bear program will I get a guaranteed slot for the 68wm6? What is the minumum years I have to reenlist to get the bonus? Will I also get to pick a choice of duty station after graduating?

Here's a great link from the 68W Proponent ... http://appd.amedd.army.mil/Enl_pg/Enlisted%20WebPages/91W_Course_Summary.htm

You will not be reenlisting for 68W with M6; you'll need to hold 68W for about 12 months before requesting M6.

Also, from the link above, "Soldiers holding MOS 68A, 68K, 68P, and 68V will not be considered."