Can I utilise this plug as a power source for a '30' relay in an ABF conversion? or shall I bin and just get my permanent/switched live from the G and I positions?
You can use this yes, feed G1/10 from ABF loom to R pin 2, feed R/1 with ignition live same as it was before so D/2 or D/7 and fit ecu relay 53 in slot 1. G1/7 pin is now unused. or bin off R plug and wire an ECU relay holder above the fusebox, earth pin 31, pin 86 to G spade 2 or 5 or D/2 or D/7, 30 to P spade, G1/10 to 87 and if using a 30 relay G1/7 to 86a