Dude I have had friends that have been bit by both Brown Recluse and Black Widows. When I saw them crawling around the first time, I said "Ah heck no," and threw the bug grenades in it.
It seemed to work 'cuz my buddy and I saw nothing but dead spiders.
We're going back to finish vacuuming it out, pull the dash, sail panels, and possibly door panels. All that stuff is going to be transferred from the convertible so all I really need to save is the rear seats (for now) and the sail panels.