I bought an inline vacuum coupler, sanded on end smooth, drilled out and cut off the burnt portions of the original vacuum connector. Inserted the coupler sanded end inward then used marine epoxy to adhere and seal the coupler in place. While replacing the hose I discovered some bad hose to the right of the T (see prev pic) that disappears into the fender well body. Cut that away, connected all the vacuum hoses and reassembled the air intake pipe. (ignore the temporary hose clamp that covers the tore flexible vacuum boot on the PCV pipe) The PO171 and 174 codes are gone. The fire led me to the vacuum leaks. Not a recommended troubleshooting process...
Thanks for your help RonJon