So with EFI, apart from the mechanical bits needed, am I right in saying the current loom gets swapped by an XR3i loom. The current ecu gets replaced with an OFAB? No more dizzy as its run off coil pack?

I intend to around or over 1 bar so will I require another chipped ECU?, what about this aftermarket management - what is this replacing? the ofab? if so, is this megasquirt the main choice?

Cheers

Apologies for the basic questions