Thanks for the info Imagine.
I just payed a surveyor $442 and he tells me I have a fiberglass tank.
The boatyard guys say noooooo, it's a metal tank.
The fuel system was converted to diesel in 1989.
The engine quits when making a hard left turn but it starts right back up.
There is a five to 10 second delay before the engine quits.
I suspect there is something going on in the tank with the fuel pickup.
Because I have an electric fuel pump the system is self bleeding so air in the fuel lines is quickly purged.
I'm surprised you didn't install a new tank under the cockpit and just leave the old one in place. That's what I'm going to do if I have to replace the tank.