Newbie here starting my first A body

That's all I can say. You guys have been gracious and very helpfull already. The rust is in the bottom of the rear quarters and I wasn't sure if going with the lower half quarter was better than replacing the whole thing. Actually, I called Speed Pro and they have a 318 piston that will work on a 273, the tech guy I talked to did some figuring and the tolerance is close however it will work. I'm actually going to build this for my daughter who turns 16 next March-she wants to help so I can't get too crazy with it. Something that will look nice have a little street rumble and some sweat equity in it so she appreciates it. So then I guess I could go with a power pack set up from Edelbrock or whoever, one of those matched cam, intake, and carbureator systems? Another thing I was thinking about was lowering the stance. Does anybody reccomend 2" drop spindles maybe, but how could I lower the rear with a leaf spring?