Put it in the front. Even though you see GTD's with in the engine room, they really don't work well there. Remember these cars came from England.............Not Texas.......there's a bit of difference between the cooling needs of the two.
Mine is in front and I ran the hoses down the side pod to the compressor and back to the evaporator under the dash. These run lengths are not that big a deal. The ambient air temp in the engine room can be 40 or 50F degrees higher than at the nose of the car out in clean air. That IS a big deal.
The side scoops will not flow enough air at low speed, the area there isn't big enough for a good size condenser, you will have to run fans all the time, the amount of heat soak in the engine room will defeat all the shrouding/ insulation you can come up with, and it's the wrong place to put it.
Put it in the nose.