Sigma Pump

Needs a custom timing cover, and I think the timing gear will be a modified oe.
 
I found some 13mm plungers that I can buy in place of my 12mm plungers for my 180 p7100. Does anyone know if they will fit without machining?
 
Never mind I was in the wrong place. Happens when your doing 90 things at once.
 
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