So a few things-
You're correct, if those headers hit the low profile pan they will interfere even worse with the road race pan, the kick outs on the road race pan are larger.
If handling is the goal, especially at a level where a road race style oil pan is necessary/beneficial, those are the wrong headers anyway. They have tubes that go under the steering linkage, so the ground clearance is pretty terrible. Handling cars do better lower than stock, and even headers that keep the tubes above the steering (Doug’s, TTI’s) still end up being pretty low. Those summit headers will end up smashed flat.
Fast ratio steering arms don’t clear any headers for a small block A-body. I don’t know what type of steering you have, I’m assuming power steering because the fast ratio 16:1 manual steering is about as steep as you’re going to want to go. A faster ratio than that and you’ll need arms like Popeye to get the car turned at lower speeds. The T/A and AAR cars had fast ratio power steering, those ended up at 12:1. But those were E bodies, and the fast ratio arms fit better. The aftermarket borgeson power boxes now available are 14:1, and they’re lighter and smaller than the factory boxes too.