[ssl78]

I think that is off a big block Chevelle. If I remember right if you look in the plenum a small block has 3 dividers where a big block would have 4 dividers. The easiest way to tell is to put it on a small block if it fits it is a small block one. A big block one will not fit on a small block without hitting the distributor. I know this because I had a cowl plenum 68 z with the cowl plenum air cleaner missing and had bought the wrong one. The other way to tell is if you have the duct a Camaro duct will have a shelf on it, the Chevelle is flat across the firewall face.