The z-bar bracket on a 67 Firebird is different than a 68 or 69. I bought a repo that was suppose to fit 67 - 69 but it did not line up to my 3 bolt holes. to make it fit and line up correctly I was going to have to drill new holes. I started looking at my subframe ( factory auto car )and the three factory holes were all ready tapped. I didn't want to drill new ones and I thought the factory did this for a reason. I started looking at this bracket on 67 cars at car shows and noticed the shape and hole location was different on the 67 cars. I bought a 67 400 4spd parts car and removed its bracket. It bolted up perfectly. By using the 67 bracket my z-bar lined up and worked great. If you need a picture send me a PM. The 67 is more rectangular the 68-69 looks like a boot shape