OK, the hub is fixed, got her back up and running..
P0135 code is still coming and going. I'm going to pull the upstream 02 sensors off tomorrow and clean them. I think they just may have built up a little rust on them while I had the headers off for so long..
The oil gauge is still freaking out on me like I showed in the video above though. Except now it freaks out every time I go above 2k rpm, and the 'check gauge' light comes on while it's freaking out now. I thought I could have too much oil in there, but I don't think I do. With the SOHC bottom end, I should still be using 5 quarts right? I'm going to change it tomorrow cause I haven't since the rebuild.
Anybody have any ideas why my oil gauge is freaking out or any ideas I can go about diagnosing this? Remember now, I have an OHV block, OHV sender unit, SOHC pump, SOHC cradle/pan and they were all working fine up until the past week.