What would/could you do with 850$ ?

I too was concerned about my quote of $600's when I had been seeing $400. I've never seen an exact break down on the cost but here is mine...$180 for the 3.73 gear, $100 for the speedo calibrator about $30 in smaller parts including pinnion seal, $275 labor. I think a lot of folks do not get the speedo work done and their readings are all wacked out on their spedometer and tach's. I've also read about the bargain installs and the resulting problems. Anyways, I had no problem spending $600 for a complete, very high quality install at a top of the line speed shop. I could have saved $400's by doing it myself, but then again I'd end up buying a complete new rearend, transmission and god know's what else to save that $400.