Valve covers are mid 60's FE, FT engines used them into the early 70's. I had a chrome set designed like that on a 66 390 GT engine
FE engine came out in 58 but the FT version wasn't installed in MD trucks until 64/65.
No way to tell what size the engine is without measuring bore and stroke.
As I said before all 391's came with 4 barrel carbs, most likely it's a 330 or 361.
Worked on several of those engines over the years, the local mill I worked at still has a 71 LT-800 391 4v 5x4 trans tandem axle they use as a yard dog to move trailers around.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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