There's plenty of information residing on this board. I recommend you orient yourself to the following three sub-boards in this order:
How to and Info Archive
Newbie
Technical Discussions
There is a sticky or see the second link within the "How to and Info Archive" located at the top of the page. This is a great place to start. It will take you to:
vfaq Much of the information that will aid in your foundational understanding of the e39a will be found here. As the 1g Talon, Eclipse, and Laser (for the most part) share the same engine, steering & suspension, and fuel system etc., the vfaq will be a great resource for you to read subsequent pages on this board and enable you to build upon your knowledge base.
Lastly, I would encourage you to (after you have sifted through the vfaq) to read older posts starting on page 8 of the "How to and Info Archive." There you should gain an idea of what has historically worked and failed. Coincidentally there is also two links to Stage 1 and Stage 2 mods too.
Good luck on your research and welcome to the galantvr4 board. Thank You for joining and we look forward to your future contributions.