Ad Guy, Kangaroo point is acceptable as we have investments in the area.
Headers and pipes from Venom Custom Fabrication at Springwood, talk to Scotty, or Fat Pipes Custom Exhausts, Anzac Avenue, Kallangur, ask for Les.
Refinish is a guy called Glenn, works from his home at Brighton (Northside). He can do all prep and primer at your location if you wish ( or his own place) then it goes away to a spray booth. I'll PM his contact details. He owns a cobra and has done heaps of top quality work.
Engineer, I'd recommend Ray Cross who comes up from Lismore way, and who does most of the Gold Coast and Brisbane cars. Again contact details by PM.
Welcome to the cobra scene.