Wayfarer.....we had a similar situation here in Oz from the late 30's thru to the late 50's in that Oz cars used both short and long engines even in the same year..........lol.........my 1940 Dodge originally had the 23" 201 engine but then for 1941 both engines are listed depending on the car serial number.......then of course in the late 50's in the Oz designed 1957 AP1 Chrysler Royal it depended on whether you ordered a standard trans, overdrive trans or Powerflite auto behind the six then you appear to have been given one or the other 230 short or 250 long six........at least if you ordered the V8 Poly then you got no choice, just the Powerflite auto.........I won't mention that I have both the 301 AND 313 Poly listed as the engine for 1957 to 1959 although the difference is just the bore..........yep, mother mopar did some strange things........and heres a couple of pics of my 1940 D15D Oz Dodge Sedan.........Plymouth body & chassis length, fenders, head & taillights, hood & bumpers.....Dodge grille, badges & RHD dash......but ever seen a 1940 Dodge or Plymouth with a rear centre armrest?......lol......the hotrod bits, ie, 318 Poly etc are my doing but the rest is Oz mother mopar........regards, andyd