The underside of your car looks amazing, clean and rust free, very nice.
I finally was able to get the kick panels off, after removing the E-brake assembly, and removing a rusted broken bolt that holds the E-brake to the lower dash, had to weld underneath the dash, THAT was fun. I then pulled out about 5 lbs of crap that has gathered in the lower cowl area behind the kick panels, simply amazing how much stuff was in there. I can now see the holes that lead to the rockers, thankfully nothing rusted through so I will just leave them as is. I cut new flaps for the rear holes from thin mud flaps and will attach those when I change the rear end out for the posi axle.
Thank you for all the answers here, it really helped me understand the rocker design.
Cheers
PS the pictures are looking down into the front rocker area below the kick panel air intake tubes, before and after removing the crap