Hy Mike B and guys, the Chevrolet 224 is obviously a bit larger than the 216, the 224 has a bore of 3 9/16" whereas the 216 has a bore of 3 1/2", both engines have a 3 3/4" stroke. As to whether these are Canadian only engines I do not know. The 224 seems to be used more in the Canadian GMC trucks, the Canadian Chevrolet Maple Leaf trucks have much more in common with the GMC truck line than the Chevrolet truck line, the largest Maple Leaf the 3 ton had true GMC full precision bearinged engines the 248 in the years after 1939. I hope that clarifies the engine questions
