You can change the looks drastically by changing the front and rear bumpers to give it a more modern look (tucked bumper). You can find parts for example here:
https://classicautoreproductions.com/collections/1974-1978-mustang-ii-body-and-bumpers
More stock look with tucked bumpers:
1974-1978 Mustang II Front Tucked Bumper
1974-1978 Mustang II Front Tucked Bumper Tucked bumper ships unfinished and requires light body work to ready it for paint. The tucked bumper also requires the removal of existing bumper assembly (some fabrication and modifications are required to mount the bumper). Flush mount to fender. Can...
1974-1978 Mustang II Rear Tucked Bumper
1974-1978 Mustang II Rear Tucked Bumper Tucked bumper ships unfinished and requires light body work to ready it for paint. The tucked bumper also requires the removal of existing bumper assembly (some fabrication and modifications are required to mount the bumper). If you have any questions on...
1974-1978 Mustang II Rear Roll Pan Bumper
1974-1978 Mustang II Rear Roll Pan Bumper These parts are made to order, it typically takes 2 weeks to receive the parts.
1974-1978 Mustang II R Apron Front Bumper
1974-1978 Mustang II R Apron Front Bumper. This R Apron replaces the stock front bumper assembly. The R-Apron attaches to the flat part at the front on the fenders just like the header panel; you can also add some fasteners trough the bottom of the header panel and the top of the R bumper. The...