['LIVEWIRE?']

Possibly not the cause of the poor reception, though it could be a factor, is that the original 1070 (not the 1070X) uses AF117 Transistors in it's RF/Mixer, & IF Stages. I also recall that sometime in the 70s a batch of Radiomobile Radios, possibly including the 1070 were produced with silicon detector diodes instead of AA119 or similar point contact germanium diodes. The wrong type may also have been fitted as an AGC Diode. These sets were rather 'deaf', so it may be worth checking the diodes, too. Edit - Having re-read the original post, if the radio used to work well in the Stag, the diodes are obviously correct, but one or more of the 117s could be faulty