Put the intakes in rear 1/4 window or panels. You need vents out of the car as well don't forget.

Thought about doing this on the Sierra a few weeks ago but then I can't carry any slicks in the back so I scrapped that idea.

Lewis... if you want my advice, stop thinking about all these mad projects and just get a nice car that you can enjoy. You think that its pretty simple and it seems pretty inexpensive... WRONG! Projects like this take years, are complex, can be unreliable and 99% of them never get finished. Sorry mate...

P.S I know you never listen to me anyway!