Found a set of B-Max lowers at a great price,I know very little about B Max. would these couple to a Bravo upper or can they be rebuilt to fit or should I just keep waiting to find a good set of IMCO lowers? thanks

I would wait to find some IMCO lowers. The BMax lowers had issues.

The Bmax lowers will NOT bolt to Bravo uppers. The shaft size is different.

But you can put a bravo vert shaft in it and it will. The previous bmax lowers did have some issues from not enough material for the front bearing race to sit on and porous casting so it was hit and miss, but the new castings are perfect. they will be at the Miami Boat show stop by and check them out, lots of changing has taken place with the new owners.