i have 3 motor stands one i built it is a 3 wheel one caster in the front stright wheels on the back 2. it has had every thing from a 302 gmc on it to a blown hemiand lots of bb chevies. no problems. the next one is a import one set up the same. i will not hang anything bigger then a sbc on it even after i welded it together. i am going to put the wide front wheels on that one. the third got out of the box and put togeher. i will not put a motor on it untill i compleatly rework it.