I believe the ground wire from the back of drivers side head to the fire wall is for the I’ll try to ground the driver side head.
Oil sending unit seems to ohm out like it should work and is providing a ground of some sort because the gauge will go full tilt with out the engine running.Any chance the oil sending unit is just faulty?
But, if coolant gauge does same thing, might more likely be engine grounds?
You have a strong ground battery to block, block to chassis?
It’s some cheap bracket I got off amazon I think. It just doesn’t seem sturdy enough. Me and a buddy went in halves and bought a laser belt alignment tool. With no belt the alt is sitting aligned as it should. I did have to trim the spacers and add washers. When I start to put just the slightest bit of tension on the belt you can see the alternator start to lean over and misalign. If I can make some sort of brace behind the alternator to pull it back just a little I think I’ll be good.Nice work! I love that you’ve built this car low budget and probably have just as much fun as the rest of us! What alternator bracket are you using? I had one like that and I had to trim all the spacers or get it to align properly. I ended up switching to a breeze automotive drivers side mount when I installed the blower. (Same accessories as you)