Mini Tub Help

Well I can tell you that Mig is good for that type of welding. If you had a Tig that would be ok as well, but most do it your self types are good with a Mig. It is easier to use. Shock position should be unchanged, so they should be fine the way they are. But I don't know about the other question you asked. Sounds like you need a angle finder to measure the pinion. It shoud be about 6-8 degrees if I remember. I never attempted this project on my car, I used a 3/4" offset spring hanger to get a wider tire in my car. I managed a 18"X9.5" wheel with a 265/35/18 tire. Lot less work, just what I was looking for.