Block type 22R
 

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Having an issue installing oil pressure sensor. I also had a problem with my motor mounts.
My truck is a 1990 base model 4 speed 22R carbureted. I purchased with a bad motor. I purchased a rebuild 22R gave those guys my core engine for a slight refund. I got most all of the parts on the front timing chain and what not. So my oil pressure sensor doesn’t fit this new block. And I also had to modify the notch on my original motor mounts. My motor mounts now fit almost right. They have a angle to the fit, but they are on now. I’m assuming my old block was different in the fact the the oil pressure sensor fit and the block accommodated the notch on my motor mounts. Anyone on here have any idea why, and if it’s a year issue with slight variations of the parts, maybe someone has the details of what I need to buy to make things run right??? Please
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And what are these numbers on the block for if they cannot help me find any information on the webnet????