Spotted GTAAH and a Silver R33 GTR today a the the united car wash on the corner of Heatherton rd and Hallam rd. I was washing the white R33.
Both cars sounded tough.
Do you know anyone that fabricates metal or can weld? if so ask them to have a go. The cast iron manifold needs to be preheated before welding otherwise more cracks are goin to show up. The Aluminium is a hard one to weld as its prob a cast alloy. You are not goin to find many people that are willing to try and weld that.