The 560 has a totally different system. Yours is electronic injection. The 560 is not. There is a relay for your ECU. On the '73 t is the second one down on the right side of the relays just below the FP relay. Probably the same on yours. Your ECU is on the firewall, the 560 has a different type below the right side floor under the carpet.
Thanks for the info Rowdie. That was my experience.