The car looks really good. After seeing the new pictures, I would say that the front and rear should come down a little.
This is just personal preference, but I'd lower it so that the top of the wheel is just up into the quarter. That would also make the rear tires look wider. I'd try a 2" lowering block and then adjust the front to get an even ride hight...or a little lower to get a little rake to it.
Finally, I'm really not a fan of people painting the front fatia on the 72-74's black. It just doesn't look right to me. I think body color would look better but again...that is just personal preference. You could also paint the grill black instead of leaving it gray. Those are just a few things I would personally do if it were mine. You can do whatever you want...it's your car.
Post some more pics if you decide to lower it and if you add any pinstripes.
