Jim, just my 2 cents here (your opinions may differ). I think you get what you pay for. I have a heidts ifs on my 39 coupe and couldnt be happier. Pete Chapouris told me, "you should only have to buy a quality part once". Since then I have only bought that kind of part(s). I would stay with a company that does IFS mainly. Heidts, Kugel, etc. That's what they do primarily and they have a good reputation. You're probably going to spend a little more but piece of mind and engineering background to me is worth it. It also depends on what you are going to do with your '46 when its complete. Good luck!