I need a tutorial

From how you described your car usage "never see the dragstrip", and " I want to feel a little extra HP when I get a chance to take it out", I would recommend the following.

Windage tray = No
Converter = No (unless you put a much larger than stock cam in it).
Double roller = only if you are replacing the chain anyway, otherwise no need.

Save your money for making the car look good...just my 2 cents from how you described your car usage.