flex fuel segment swap n 3 bar upgrade

[prostreet1967]

question if i want to swap segment of engine to allow flex fuel sensor n then upgrade to 3bar would that work

i downloaded a 12216125 os with flex fuel option i opened my stock 02 sierra tune opened the flex fuel tune in compare and its greyed out. if i try a different file it works but others it doesnt. what could be issue

[prostreet1967]

Ok found the flex fuel file I want to use doesn't have 3 bar option