suspension questions

[94Gtstock-newclutch]

I am looking at some C springs and the tokico illumana 5 ways.

1) do i need C/C plates since the drop will only be about an inch?

2) should i get the 87-93 illuminas or the 94-03 since i am lowering the car?

3) if i do go with the 87-93 is the installation still straight forward?

4) also the cheapest i can find the the
springs is 122+shipping
shocks/struts 450 shipped

any better deals out there?

thabks Terry