Mocking everything up ahead of time is key when building something modified. I was gifted a newest of headers but had used an older set for mock up, of course the gifted set wouldn't fit. I did some serious research and talked with a ton of Tech Rep's before I found a set to clear everything, even the starter.
My '59 is modified using a 327 V8 with side mounts, dropped front axle and a CPP power steering gear. These headers clear, I still have the rear engine cross member.
Craig "Living life in the SLOW lane" Come, Bleed or Blister something has got to give!!! '59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting) '58 Viking 4400, 235, 4 Speed (Thor)
They clear pretty well. If your concerned about heat add some Dynamat or other thermal insulation to the floor.
Craig "Living life in the SLOW lane" Come, Bleed or Blister something has got to give!!! '59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting) '58 Viking 4400, 235, 4 Speed (Thor)