Ive started making up the exhaust. Im trying to make it sit as high as possible so the flat floor and diffuser will still be effective.

I think i'm going to chop it in half now and re-weld it to have it going out the passengers side at the rear. Having it go out the drivers side will make the exhaust straighter but as i'm having the flat floor, the gearbox and diff will be getting hot with no airflow around them. I think a cooling channel running between the flat floor and gearbox/ diff/ exhaust will be wise. At the start of this channel I am thinking off having the air intake. Hard to explain in words but I will get some pics up when I start the floor