You could always unhook the water alarm sender.

My OCD wont allow that.....lol

im gonna check all hose connections, try the 140 thermostat and see what happens.

If it still sounds alarm im going to swap the 2 senders while on the water and try again

the only thing i have to go on is
the water psi is 10# when sounding. 15# when off. Seems like it would be related to thermostat opening/closing?
temp gauge stayed at 150 the whole time till i came back to idle then dropped a little
alarm only sounds when above 2500-3000 rpms.

Got a pic or diagram where all your senders are ?

Alarm sender on the right.

I'm seeing adapters under each sender. Wonder if you have a grounding issue.

I thought about that but
1 it was like that when i bought it and the problem just started
2 if it was a bad ground would it make the alarm sound? I would think the other way?

Possibility that the senders being in pockets in the adapters could have them up out of actual water flow.

have you actually shot the engine w/ a infra red temp gun and see if its hot?

Make sure it's not the drive oil bottle sending the alarm, disconnect one sender at a time to be sure,

hi-water-temp, drive-oil, low-oil-pressure.

Sending wires crossed???