On the oil sender, have you removed it to see if it the tiny hole has junk in it?
On the alt's. Are they from a parts store of Toyota? I've had bad luck with toy alt's from parts stores.
Is the switch bad or is it just because of a broken key?
I have taken a paper clip and strightend it out and made a very slight bend at the end and fished several keys out of switches.
As for changing it out... I just got a '91 and the plastic around the switch will come off, it just clips in...
Hello Turbo,
I feel your pain. I was rebuilding a '86 turbo truck back in 1999. (Pre DSL) took me two years to find the manifold that the turbo bolts to.
Where are you at on this now?