I used heavily modified Hooker 2122's, CBR kit, and 3rd joint kit on my car with a Muncie M20 floor shift.
A few issues with those headers that I found on my car:
1). #3 tube touched my oil pan, scratching up paint off the pan.
2). #2 tube ran over and down near the passenger shock tower, getting to the #4 plug was utterly painful.
3). #1 tube prevented me from getting correct geometry for U-joint down to steering rack no matter what I tried with 3rd joint kit. Always had interference with the steering shaft hitting this tube. I also remember it came super close to the oil filter too, making oil changes extremely fun.
I gave up and brought the car and headers to my exhaust shop and he modified them so that all of the above annoyances were fixed.