Got my head battered. If I pull the fuse on the MSD loom (so it doesnt fire the pump), connect all the + connections at the battery, but only the negative from the MSD loom, the new relay clicks open and closed (without the old relay connected, so its empty), and no ignition.

So it must be getting voltage on the old pin 86 which is the old pump + on the new loom. Either that or the new relays wired wrong??