230 l6 inline six

The L26 230 pictured could be a 1963 through 1966 version (62 & 63 sixes used an oil filler that was in the middle of the rocker cover). It was used as shown in 1965 and 1966 Chevelles. 1967 versions had decal moved to air cleaner, plus fuel pump looked like an inverted V8 mechanical pump.