Gday mate, im also heading down the same path as you, but ive got a GTR 30/26. I got my block made at Spool Imports who im fairly sure are located in QLD.
As people have said, 8-9k for engine / head work no where near enough for the amount of power you want. Ive spent roughly about 15k and my head isnt bolted to block yet. It probablly can be done within 15k for block done, head ported, new valves, springs, cams etc etc.