I know that I am late to the discussion, but, as said, if the work being done is quality, and the parts are quality, etc, then 4k can be quite reasonable. Up in the north east, when I was looking at having my engine taken apart and re-done and machined etc the estimates that I got were around 5k for the engine, while keeping everything more or less straight stock, and another couple thousand for a complete transmission disassembly and rebuild.
After seeing those prices, I went another route, and bought Al Gary's recently rebuilt with performance parts engine along with his HVDA transmission, tripple ZS intake, and other parts for the same cost as it was going to cost me to have the work done on my stock parts.