Hey Thomo5150, to answer your question, extremely tight, however it can be done, i am planning on running the rrs shock tower notch kit to give clearance for the headers.
CRCRFT78 here are some pics of the ute, its a manual and makes about 445hp. Your right they should be the new el camino ss. Not many peope here like the chevy badges on it but I think it looks heaps better.