So, I've collected a bunch of parts.
I've got a 2000 Jimmy 2dr 2WD
How much of a drop am I looking to get?
I'm not even sure about the leaf springs fitting, can someone chime in?
Will I need to get c-notches?

All Belltech:
2102 spindles
4223 coils
5954 leaf springs
6102 2" angled blocks
8502 rear shocks
I need front shocks

Also, I have 18" wheels, 245/45-18 tires.
Will I run into any problems? Searching and reading results in about 4,927,361 pages to sift through...[/align]

The leaf springs are for an s10/sonoma not a blazer/jimmy, they will not fit(different lengths).
The front will drop 4" and since the leaf springs wont work the rear will be 2".
You can run 4" in back with no problem with the 18's(I've been doing it with 18's). Im not sure on the front since I only have 2" in front.

edit: sorry just did a quick search and 18x7 4 inch bs 225 45 18, 225 40 18 will fit and
18x8 4.5 inch bs 245 40 18 <--bigger than this will rub