what model, size of engine year do I have

I have a Allis Chalmers tractor that was supposed to be a 1949 WD 45 with a 4 1/8" overbore 226 engine. I have the # off of the engine it is WD334337PA. Could someone tell me the year,size of the engine, & whether it is a WD or WD45? The only thing I know for sure that it is a 4 1/8" overbore.
 
Measure the stroke. If it is 4 inch it is a WD engine. The engine from a WD-45 has a 4.5 inch stroke. The 4.125 bore is most likely and aftermarket sleeve and piston kit.

Kent
 
If there is a steel plate behind the dist, then the block is WD. Without measuring the crank, it's impossible to say. The 4" and 4.5" cranks were innerchangable from WD to WD45. 4 1/8" bore is what just about any aftermarket kit is gonna be.
AaronSEIA
 

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