1970 360?

Was there a 361 truck engine? It would be a "B" motor of course. I know there were 361's in cars for years, but did it not carry on in trucks? Its possible that early 71 360's would have 70 casting dates. If there is any documentary evidence of 360's installed in any 1970 model year vehicles, I would love to see it. Its also more than likely that the original 318 was replaced with a 360 somewhere in time. Hope you get to the bottom of it. The 71 360 is a very nice engine to work with.