Schumacher SB to BB Biscuit mount not fitting

Loose factory k frame tolerances may come into play. Are you using an HV pump? they are a little longer off the block. I have a sb frame modified for bb and a set of schumocker (funny) mounts with a standard oil pump that cleared fine. I am not using either of them as I have an original bb k and mounts now. Too bad your so far away.