It depends on who is nominated, but it might backfire. Rank-and-file Republicans would not like the idea of being "told" who to nominate essentially, and there would be significant opposition in the primaries to the new VP.
Congress basically "chose" Ford in 1973. I doubt if they will roll for Jeb Bush, but someone might surface. It will be the candidate of Congress, not an extention of Bush 43.
I would also note that you would have to go back to 1928 to really find an analogy. Turman entered the race in 1952, but withdrew.
