The camera mount that I use now is in the photo below.
I like it a lot. The videos from Shenandoah that I posted were taken with that camera. I like it because I can provide driver's view or angle it from the passenger side for different perspective.
$49 from http://www.soloperformance.com
As for mods. If I do make any changes, it would be to keep the car Normally Aspirated. So, a tune, CAI, maybe some mild internals...
That would really be about it.