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One hole is old injectors, two hole is newer. Use the 2 hole injectors.

Frank, in that technical article I posted, if you had just scanned the pics, you would have seen it! With the 2 hole injectors, there is a "main fuel ray" and a "fuel ignition ray". Most of the fuel is sprayed down into the bowl to assist in the "swirl" created by the piston's "swirl chamber"...

Ask and you shall receive!

What is welded on the frame behind the alt?

HA! I recognize that board in the left of that pic...

That is not quite right. I have had both, turbo(m35) and non turbo trucks(m109). Both ran used oils just fine. It has been stated the used oils will wear your injection pump.