The 235 is a lot larger six (in terms of physical size) than the 230. It's physically heavier than a 292, and about the same height. Your truck will definitely not have a 235.
A couple more things - the 230 will have two small lifter covers and the 235 will have a single large one. The 235 usually had front mounts in light trucks but the 230 always has side engine mounts.
-ftyler
