98redstang

I have a couple of questions on what to get for my car. I want to get lowering springs. Are they worth it cause i just think the looks like it sits to high? Next would be i need a tranny rebuild so while its out i wanna put in a new clutch which one should i go with? And also should i buy an aluminum flywheel while im up there? Also what about a tb? What size/brand?
Thanks,
Greg