If the hughes dipstick tube is the one that jeff's sells I was able to get it to work, but it took a little work to do so. I will add that I have a bronco stock pan.
The bend were it connects to the pan is longer, I was able to bend it without kinking using what I had (my trailer hitch with 2 5/16's ball). Once I got the bend as I liked it, the mounting bracket that mounts it to bellhousing needed to be cut shorter and the hole redrilled.
From that point I don't think I had to do any more to it. It final resting place clears the back corner of the valve cover by a 1/4" and the handle finishes out about 2" above that corner. The dipstick tube comes to withend a 1/4" of the header tube, but doesn't touch.
The transmission lines if stock won't fit any more with long tube headers. But I didn't have the stock lines anyway. When I made mine one goes behind the tube and one is outside the tube, its a tight fit but if I had to remove the lines, once the dipstick tube is removed and the starter the line drop out the bottom with little or no problems.
When I did mine the whole assemble was sitting on the floor so it was easier to do.