ossie, if you can only make it to the pits the day before the yellow expires. Just try to change as much as you can that you think will help, if you don't pass you can get it extend for i think its 2weeks but it cost you like $70 or something like that.
the only thing i can think of with your bov, is can u remove it and just place a metal section over the hole. or is the bov complete welded to the pipe with no part that can be removed?