That's so far out in left field! There is no way to install the distributor gear
"backwards/180 degrees", upside down or any other way. Figure it out, if you have two teeth on one gear, the gear meshing with it has one gear tooth between those two...but here is another on the other side waiting to mesh on the next rotation. You are waaaay over thinking this! You need to move the oil pump slot to wherever it needs to be to have the rotor pointing at #1 tower on the cap when it rotates down, and the distributor shaft drops into the slot, period. Is this a joke thread??