Anyone with experience building tri y headers

How you guys bending your tubes? I built a set for my 65 out of about 3 old sets that I couldnt toss as I though had some sort of value...years later I ended up cutting them up just for the mandrel bends. Just simple 4 -1's but the hard part on a 65 is the driver side under the steering box. If you can tuck the (smaller) pipes between the block and the steering box, your good to go but I think I ended up taking the #1 straight down and then back. seemed to solve alot of real estate issues. The style of headers with the #3 going up and over #5 and then diving down way over at #7 was a good start as you only had to mod the #3 tube to tuck behind the steering box (Id wrap that one to protect the steering box from the heat). I found the passenger side was a drop in for stock headers. Cant remember any issues over there, but these were not max effort headers, smaller tubes. Even a B in there with big block headers on the passenger side fit with minimal issues down at the tie rod end. I ditched my fenderwells since then to get a real simple design going for my stroker. I got a set of old Cyclone fenderwells for a '65 that I will be using as a template, very simple angel wing design. 2-3 bends per tube. Of course if your going to turbo it, its alot easier to design a short 4-1 to go forward to a 2-1 flange for the turbo inlet....:-)