98 mustang gt auto to manual conv


New Member
Mar 11, 2021
This weekend I plan on swapping my automatic 98 mustang gt to manual. I bought a 99 parts car and took the everything I need except for the computer off of it.
that being said I have to use my auto computer (different model).
I know I need to get a tune or ecm flash but would I be okay driving the car until then?
PLEASE HELP! Starting tomorrow.
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