Both of those cars pictured have had the control arms fixed.....
Not sure what that means either?
My '69 certainly doesn't look like that (wheels straight up) when I jack the front end up. The wheels look like Jay's '69 in his photo. I bought rollerized lower control arms and spring perches, so I'm pretty interested in this subject also. I didn't buy the bump steer kit though, because I hadn't heard of anybody saying it was needed for drag racing, only road racing.
As for lowering the car further and smashing headers, and since you can't use limiters, couldn't you just as easily use bump stops to limit compression? That's what I was planning on doing. I was also looking at using a road race type pan with extensive baffeling for oil control, to keep the pan a few inches higher than the deep pans, and using a set of headers that didn't hang down like the old Hooker race headers did. Earl was using a set that didn't hang down so low, but my failing memory can't remember the name of them. At least not without going back to the thread where we talked about it
JBL, maybe?