1) You could make your headlight covers go extend from the outer edge of the grill to the edge of the fin. Start them at the upper corner of the bumper then radius them up onto the hood surface.
2) If you have a sawzall you can narrow the bumpers fairly inexpensively.
3) I would think these are all pretty small changes that would't amount to much savings. Whether it is worth it is up to you.
4) With the amount of taper the lower body has you may only be able to make a half-skirt & would still need wheel covers.
5) They do make 2.73 for the Ford 8.8.
SUPERIOR AXLE & GEAR - products new home - Superior Axle and Gear"s Ring and Pinion Gear Sets
You may investigate if someone makes a transmission with an overdrive gear & a lock up torque converter that could be swapped in.
Good Luck
Don
They do make 2.73 for the Ford 8.8.
SUPERIOR AXLE & GEAR - products new home - Superior Axle and Gear"s Ring and Pinion Gear Sets