Take some time to read the FAQ page on my website. It will give you a lot of basic Terminator info, specs, recommendations, etc. http://stangshiftergaskets.com/2003_2004faqs.htm

Then before you buy anything, decide what your goals are for the complete drivetrain, interior and exterior. How much power are you looking for? What is your budget? Will your car see a lot of track time? Do you want to do everything at once or start out slowly? Then prioritize your mods according to your needs and budget. It is also recommended to work with your tuner or with a good shop to help you put together a coordinated package that will meet your needs best and help you spend your hard earned money wisely.

Best of luck!