[Porsche-O-Phile]

I've owned three F-body cars in my days (never again!) To the above I'd add the front quarters behind the wheels (and all inner sections behind the wheels where gravel / salt / junk gets kicked up and lodged in there), definitely around the windshield as was posted, lower floor pan (I had one rot out where the e-brake cable penetrates - not fun to fix), pretty much anywhere in the trunk (side areas where it dips down behind the rear wheels for sure), rear quarters seem particularly susceptible as do the lower doors (drain holes are junk and plug up, allowing stuff to sit in there and wreak havoc).

I'm one of those guys that's been through too much hell with GM products to ever consider owning one ever again - I don't care how much they claim to have atoned for past sins or how much they say they've figured everything out. I've simply suffered too much for too long in the past to ever take a chance on one ever again.

Good luck with it!