Thanks for the reply.. I dont know much about the turbo housing I have. I was told that I need a four bolt housing because the backpressure will be real high from a 6.0l engine and the 3 bolt would be a big restriction. Is that true? I am building my headers and downpipe as well as all the ic piping so as long as it will work with the turbo I have then the rest can be fabed to fit correct? I called 3 or 4 months ago and asked about a 4 bolt housing and was told you dont have any and dont know where to get one.