I have an l28et installed on my 77z last year. I was lucky i found a posting in craigslist for 600 complete with ecu and harness. This was removed from a good running car. No leaks. Anyway since I am installing this to my car, I had it rebuilt from sunrise Z since i dont have the time to do it myself. I paid total of 4200 thats with rebuild, parts including new pistons, head work, removing the old engine and installing and wiring the l28et harness.