There is 4 terminals on the right hand side of the distributor cap were the wires go. It will be the first one on the cap towards the front. That is if the distributor is in right.
The coil pack towers are numbered : coil---3---4 pack--2---6 plug---1---5
A diagram of a 4.3 Vortec motor can be found in manuals, books, and online. There are several websites that show diagrams and books can be found in stores or local libraries.
The timing on that engine is controled by the computer. You can not use a timing light. The only thing you can do is move the distributor enough to get the engine to run and have power and that is called the base timing. When it does run and the engine light is not on then you got lucky, but if the check engine light comes on, then you will have to get an engine scanner and hook it up and go into the timing mode and move the distributor until you get the cam and crank in time. The scanner will show you when it is in time and the engine light will go off. Tighten distributor and your done. The computer will do the rest.
The Roseanne Show - 1998 was released on: USA: 14 September 1998
The Tim Pipher Show - 1998 was released on: USA: 11 November 1998
The Howie Mandel Show - 1998 1998-07-06 was released on: USA: 6 July 1998
The Howie Mandel Show - 1998 1998-08-11 was released on: USA: 11 August 1998
The Howie Mandel Show - 1998 1998-08-24 was released on: USA: 24 August 1998
The Howie Mandel Show - 1998 - 1998-07-06 was released on: USA: 6 July 1998
The Howie Mandel Show - 1998 - 1998-07-24 was released on: USA: 24 July 1998
The Howie Mandel Show - 1998 - 1998-08-11 was released on: USA: 11 August 1998
The Howie Mandel Show - 1998 - 1998-08-24 was released on: USA: 24 August 1998