Problem solved.
Only took 6 or 7 weeks for me to actually look at it.... lol.
Two blown 20A fuses found.
1) CLK LTR CTSY - explains why my clock, lighter and dome light quit working (now working).
2) SIG-B/U GA-
TCS - obviously turn signals, back up lights and gauges (now working).....
what's TCS? (transmission control switch?????.... disconnected when I swapped in the 5-speed).
Still not 100% sure why oil light was powered.... may be part of the GA-TCS blown fuse???? Obviously, since it's all good now.
How it's supposed to work: (If I read Chuck's diagram correctly)
---The "start" fuel pump circuit (no oil pressure) and starter gets power from ign switch across the radio fuse (radio was working while this was going on????)
and the oil light (was not on with ignition on.... so no "start" fuel pump).
---Once oil pressure is detected (OP switch closed) the ignition switch powers the "run" fuel pump circuit..... cutting off the "start" circuit when the oil pressure light/oil pressure switch is closed.
How mine was working:Turn ignition switch to "on".... no oil pressure light (supposed to be on).
Turn ignition switch to "run" ... oil pressure light goes on.
Just opposite of what it was supposed to do. Maybe since the gauges fuse was blown, there wasn't any oil light power until the oil switch powered it when it closed.... kinda getting in the back door??????
Thanks again for all the input and diagrams.
Marco, I re-crimped that water temperature sender wire.... maybe it won't blow any fuses if it comes undone again!