Great to see someone else with this head in aus!
This is what I did about not having any vac take offs, we press fitted some tubes in to each port. Note the angle to clear the injectors..
![Image](http://i1148.photobucket.com/albums/o572/nathanfielke/DB4C6158-151B-4073-9210-B190BF6ECB89_zpsnemchrlm.jpg)
I wasnt convinced this would be enough to run my brake booster so I put a electric vac pump in just for that. It needed a little tank and a home made controller using a GM Map sensor to keep between 15-25" of vac to get a good feel to the brakes and not run the pump to hot.
![Image](http://i1148.photobucket.com/albums/o572/nathanfielke/33A24994-1F2B-4F6A-9E42-7448934A1A6D_zps5icrnbqr.jpg)
A few things I have found with mine that you might want to look at are, where the spark plugs are drilled and tapped in to the chamber there becomes a very thin section of the alloy that i had melt and crack. Mine was running with its turbo so maybe the extra heat from that didnt help but something to think about.
When the Head was new:
![Image](http://i1148.photobucket.com/albums/o572/nathanfielke/D57F7F2D-7B20-4AAA-A804-3E9C486D12FE_zps14vi3lqe.png)
After a few 100km inspection
![Image](http://i1148.photobucket.com/albums/o572/nathanfielke/F006F933-70BE-47E6-B623-09CE13034481_zps9wptpopy.jpg)
![Image](http://i1148.photobucket.com/albums/o572/nathanfielke/66D36C7C-582D-46F9-AEF3-517CD92B24F3_zps652plafv.jpg)
This is what I did to over come it:
![Image](http://i1148.photobucket.com/albums/o572/nathanfielke/C2FDA294-3CB7-4C84-82F1-5E5FE6E78853_zps87jkf8ec.jpg)
One other thing is the heads are very soft, my rocker posts and head studs sunk into the head a little, so re tension the head a few times after its been hot.
I also had the small rocker stud pull the threads out of the head when putting it together the 2nd time. ARP studs using a torque wrench, so we are having to helicoil them atm.
I had had mine flow tested twice after some mods if you are keen on seeing let me know
Thanks Nathan.