With my kids help, I finished rebuilding the engine.  Once done, I dropped the engine into the jeep and attached the new headers — only to find out the new headers don't fit.  On the left is the old header that fit perfectly.  On the right is the new Headman headers that apparently have a shallower drop, which directs them straight into the roll cage mount.  l'm pretty sure I can heat and bend them enough to make them work, but it's less than ideal.