Don't pay someone, and do it yourself, so you know it is done correctly (granted your decent with a wrench). Someone who you pay may rush it or not give the same quality as if installing yourself.
If you are installing speed daddy headers on your car first before doing anything use a pipe expander to open up the pipes in the overlap area. This will give it more play when you go to install them making it much easier to align and get a good seal.
Don't skimp on clamps. Forget the U band clamps they sold you. Get some of the 2 bolt easy seal bands from napa or from torctite online. Get RTV Ultra Copper and go to town. Make sure to clean up your stock metal manifold gaskets nicely, and get the gaskets with the metal inserts for the downpipe to resonator. Use lots of RTV @ the V Clamp.
When removing stock rear manifold make sure engine is all the way forward as you can access it this way. May need to cut off downpipe bolts or heat them up to remove.
