you would need all new mouldings, the ones on the gt are all attached to the ground effects(except the 1s on the doors)
later
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1988 Mustang GT, T-5
3.08's, No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe, K&N Air Filter (Stock Air Box), Removed Air Silencer
My Stang
My Site (Not Done Yet)