I have not used them but I have three good friends that have LS1 long travel desert cars (100K buggies
) with his engines. They take them south of the border balls out several hundred miles each trip and they run solid. Turn Key Engine Supply is also the preferred C.O.R.R. off road truck engine supplier. I think Kolby has done good for himself and everything I heard has been good. I have another friend that has one of his ecotec 2.2L in his Baja bug. I would agree that at first glance the price seems high but it includes headers, efi fuel pump etc. Everything including sensors. I went with LS3 but thought I could save some coin also and did not use him. In reality though I will be in the same range. It just seemed less of a blow because it was spread out to a few suppliers over time.
http://turnkeyenginesupply.com/street_62480.htm
http://turnkeyenginesupply.com/streetpackages.html