[1963c-10]

Completely different engines. Many differences. Valve cover is the easiest tell tale sign. Distributor is placed further back, exhaust manifolds are different also. Here is the 235. The orange engine is a 292, which is the larger 6 cyl made when the 230/250's were made. The look pretty much the same as the 230/250, there are some differences though, most notably they have larger push rod covers and the engine has different mounting locations.