Oh the joys of growing. Check out Jamstagaters cab, I think that he has his in the cab, but you will still have to makes some modifications if you are going to pull the hot, danky air threw it and keep the cab cool. This is why the older growers are always critiquing our plans so hard though because it is things like this that the new grower just seems to over look that can change the whole set up.
Good luck and I hope you get it figured out.
Adieu