Those wheels are Halibrand 5 spoke magnesium wheels popular in the 50's, 60's, and early 70's. That was prior to the aluminum wheels and where the name "mags", or "mag wheels" came from. It is also a 55 and not a 56 as it does not have the Continental kit hanging off the rear of the car. It is defenitly a custom as it does not have the crossed flags or T-Bird winds on the front above the grille. Have to stop here, anything else would be a guess which was not wanted.
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Yellow/Yellow Prem. 02 Bird w/full accent
1999 F150 Super Cab 4x4 Off Road
1998 Taurus SE Sport 24V