I have the Amex Delta Gold card.
I would like to use the priority boarding feature that comes along with the card on a DL operated flight but would like to accumulate the miles on AS.
The card says i must include my DL FF# number in the Resv to utiltize the free bag and boarding. I don't care so much for the bags.

If i were to check-in with the DL FF# can i go reprint the boarding pass at the gate or change that after check-in?