I purchased a used 71 TLC from California. I am now installing a 2 piece header from edlebrock on my it. I need to remove the egr gas cooler to make room. What does this piece do? Do all fjs have this piece? My Chilton says it came on California models after 74. Could my motor be a later model? My egr cooler has been modified by the p/o. He welded the top tube shut..... so it probally isn't doing much as is. The other tube coming from the egr cooler is connected to the xhaust manifold. Thanks