Hey Jerry, is it possible this is an F3, not an F7? I’m looking at the grills, and as I have learned in my own quest to build the NS Office Car Special, the grill-work on the side of this engine appears to be F3-style, just like the USA F units.
I just did a quick search, and I found that the last phase of the F3 was built with the F7 style side intakes.
I’ll be honest, I can tell F’s from E’s from GP’s from SD’s from Dash-8’s from Dash-9’s from Centercabs… I think thats the limits of my diesel spotting abilities. Give me external combustion anyday!