Please excuse my lack of knowledge, but could someone please explain what these black boxes labeled 'fuel' and 'comp' are, their purpose, where they go etc.
I know this is a stupid question, but I am a beginner... I thought that posting it in this forum might shine some light on the subject....
Thanks to those who want to have a look at this site

The photo is located on this site...
http://home.iprimus.com.au/pulsr/g13b/
engine conversions > more pics > bottom left -( photograph of firewall)