I am planning on swapping in an S54 and moving towards total track set up for my son and I . Over the weekend I located the engine, harness and ecu so we are on our way to getting this done. We are also going to put in a 3.91 in the ass so this thing should be lightning quick. I did stumble across another s54 that the owner said he would sell for $3000. Don't have any details but if you are interested you can contact me and i can give you his contact info. Hope to have all the parts in about a month and then go from there. Should be a fun project.