Yes, that makes sense. Looking at the web page I linked above:
Quote
ENGINE PREFIXES to 1953:
216 CAR: NO PREFIX
216 LIGHT COMMERCIAL: “C”
216 TRUCK: “X”
235 TRUCK: “T”
239 GMC/PONTIAC: “W” for “Walkerville”?
PLUS ALL R.H.D. ENGINES HAD “R” AS A PREFIX
AND “A” FOR “AUSTRALIA” CKD?

Gord 🇨🇦
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1954 1/2 ton 235 4 speed