Peter:

The sensor device is in the rear of exhaust manifold, on the right side. It had been epoxied-in. Wire was frayed and holding on by a single strand at splice point, so I've cleaned and crimped it. Waiting for my battery sealer to dry, then I'll power-up.

Yeah. Typical retrofit kit. Last week, with Steve's help, I removed the injector serving as add-on frequency valvbe in jigged-up auxiliary fuel return line. The rubber hose end of the injector had cracked, and rather than spend the $$$$for a new EFI injector (which is what was used), I just - with
Steve's advice - removed section and clamped-it-off. No fuel problem with that-if anything, pressure is up a bit.