Buda WTU 4 cylinder firing order?

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Anyone know what the firing order is on BUDA WTU 4 cylinder engine circa [b:097426e15a]1926[/b:097426e15a]?

A [b:097426e15a]1951[/b:097426e15a] Buda manual says all the company's 4 cylinder engines are 1-3-4-2

However, it seems to run better at 1-2-4-3. Maybe the Buda firing orders changed at some point?
 
Looking at in what order the intake valves open would eliminate ALL doubt.

Also, are you sure you are correct in which way the ignition rotor turns?

Looking at a cap in which the wires are arranged 1-3-4-2 and thinking it rotates the other way will give you 1-2-4-3.
 

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