I searched other posts and didn't find the answer. First what year did ford switch from the 28oz to the 50oz balancers. I currently have a 87 302ho motor in my 67 but I'm building a dart block in a few weeks. Can I use my 50oz balancer and flywheel on the new dart block or does it depend on what the crank is balanced at. The major problem I have is I bought the rotating assembly new/used. The person who I bought it from can't remember what the crank is balanced at. He bought it from Wynne Speed but when I called them, their numbers don't work....So I thought all 87 and up blocks were balanced at 50oz...Please tell me I'm correct...