I think the possibility for a Johnson re-election is generally underrated for all 1968 discussions, although I may be biased here. He was a mater politician and had incumbency advantage. Wallace does better with a moderate Republican, picking up Southern states. Not sur about Florida in this scenario, I think any of the three could win with with less than 40% of the vote.
✓ President Lyndon B. Johnson (D-TX)/Vice President Hubert H. Humphrey (D-MN): 273 EV. (45.09%)Governor George W. Romney (R-MI)/Governor James Rhodes (R-OH): 199 EV. (38.27%)Former Governor George C. Wallace (A-AL)/General Curtis E. LeMay (A-CA): 66 EV. (15.48%)