iain mcfly

Gday all My R33 has done a headgasket I believe (oilcap is sludge, sounds like a WRX, and when it warms up, it Exhaust becomes a chimney) I've Called up a few places and the general price I get to fix it (new headgasket head work etc etc) is from 1500-1900. I know most people would swap another engine in but that would cost around 3-4k (engine and labour) just curious (if anyone would know) if I supply the parts for a rebuild what would the labour cost be roughly? or should I just get a headgasket fix