Best bet it to get the pedal and TAC with the motor. You can get the pedal and TAC elsewhere, but it is imperative all things match year wise and you have more variables such as adjustable pedals you could run into.
A cable X box will make the speedo work, or one of the members on here posted how to make your speedo electronic.
Headers, I and others have had good luck with Trail Blazer SS (TBSS) manifolds.
Return line from the vette filter must run back to the tank. Hope this helps and
