Be very careful before you decide to spend any money with Clifford. They have a long and ugly reputation for being a bunch of clowns; see for example
here,
here,
here,
here, and
here.
Dutra Duals are a better deal—if you're driving on the street and it's not a hairy race motor, use the Dutra front header and a cut-and-capped rear half of a stock manifold if you're using an intake equipped for manifold heat.
If you're
not using manifold heat, and you want to minimise your spend, grab a Dutra front-3 unit and snag
this to go with it.
Rest of exhaust system: see
here or
here for my reco, then do wha'evvuh you want! 8^D