It is a very pretty piece of iron, and it is a hard to find part on the used market. It fit perfectly into the car and to the factory 1969 351W H pipe, however, there is a small difference in this casting vs a factory casting on the short side bolt holes. The factory has circular bolt recesses while this casting has a straight recess on the port side. It's a slight difference, but on mine, this was too tight to fit a socket over the factory sized exhaust bolts, so I had to use a smaller head header bolt for the short ones. A minor annoyance as now I have two different sized bolts on the manifolds, but otherwise, they fit and look great!