Drop first! It's hard to stay dropped without getting some bigger rims though. Don't know how Astro does it!!

But I lowered my car first and could not resist getting some nice rims second. Kit should be last because it would put the cherry on the top of a lowered car with nice rims.
If you have to go one at a time then...
-Put it first and it would look wack.
-Put rims first and it would look like a monster truck,
-
Lower it first and it would look sweet!
I got my rims and tires barley used for only $560.00 Loven every minute of it. Handling is so much better.