i was just wondering if any sort of au 4L head would fit the el block without any modifications?? any suggestions??

Yes bolt straight on as prove you will see that i have a Slightly Worked AU XR6 head on my ED block. No problems straight swap over. If after a AU head mine is for sale in the for sale section of the site.

Arent rocker ratios different? or is that only EF?

Rocker ratio is different but oyur changing the entire head and cam so its no problem

do the manifolds and wiring macth straight up aswell.the reason I'm asking is because I have just picked up an AU XR6 long motor(head and block/internals).Ialready have a 3.9 multipoint wagon for a donor but I have access to a XH ute(no head).
Idealy I want to hook up the multipoint injection to the AU XR6 motor and use XG mounts to bolt into my XF(86)panelvan.Turbo's are also going on once I have initial motor installed and driving.
Will the multipiont ecu run an AU XR6 motor without having to add sensors and wiring for model specific extras? Budget is all but gone for now but need to get car on road and completed. Any help,knowledge,experiance with this mod would be greatly appreciated.