Also, I also had a water leak that turned out to be a brass connector attached to the port out of the sea-water pump which provided my Water Pressure. The way my AT with 496HOs was originally rigged, out of this port was a Tee to split "output", and sent WP signal to the PCM, and also a mechanical gauge on the dash. One of the brass fittings cracked.

26sonic. Have you ruled out swivel shaft seal? If you havent updated to SS yet I'll put $ on that is where the water is coming from. BUP. That was me at Buffalo with the Whippled 496. Yes I fixed it. Imagine that someone actually listened to you!

LMAO too funny - see I have a good memory. As you had / still have the Sonic as well ?. Do you remember what I told you about your Serpentine belt as well ?

Still have the Sonic but listed last week for sale! Looking at getting a larger formula SS. I cranked the belt a little tighter too! Great memory!

Had the same symptom, ended up being the end cap gasket on the heat exchanger.