My 74 has a yellow box under the dash, appears to be a computer ignition module? It has PCI/TR/UC.. what the hell is this and what exactly does it do? I no longer run any factory ignition, all msd, but keyed thru the column switch. Thanks !!
Thanks all for the reply took it out..we'll see . Dash guage pod is in and at least the lites work. Have ignition, starter,elec fan and fuel pump all working as before. Couple of other little things to deal with then we'll see of she'll fire back up again.