265 hemi straight six
@slantsixdan - the only thing nutty in my humble opinion is your over the top insulting response. I clearly offended you, and your chryslerness, which I never intended to do. But to be quite frank, externally, the engine bears a strong resemblance to that family of GM 6's I noted. To deny it is to deny rain gets you wet. I was already well aware of the history you referenced. Hope you'll consider being more civil in any future rebuttals.
@Ratrodal - Yes, they do have a tappet access plate on the side of the block like many upright, inline sixes going as far back as the flathead era.
@toolmanmike - now there's a "HEMI" (looking) six !!! Is that photoshopped??