I believe 3* is the factory driveline angle so if you're able to get to 2.8* you should be ok on the engine transmission angle. With the car lowered mine gets tight at the back of the tunnel which limits rear end travel. Which then it gets into what diameter driveshaft are you going to run. The 3/4" a Ford 9" gives on the pinion would definitely help. My car is not together but I have played with this a bit. I have a T56 magnum and a 12 bolt. The 1350 yoke is tight at the brace between the seats. I could cut the brace and fab a reinforcement piece to gain 1/4" to 3/8" if I need to. If I remember correctly I'm between 3* and 3.5* down on the engine/tranny. The driveshaft looks like it's going to run pretty close to 0*, so I figured I could change the pinion angle to offset engine tranny angle. It's tight at the rear of the floor pan by the front of the rear seat. I believe I can get by with a smaller diameter drive shaft, so to handle the HP, the critical drive shaft speed, and be a small diameter, I'm looking at a QA1 carbon fiber driveshaft. They're only 3.2" in diameter. On my initial look at this it looks like it will work. I moved the rear up to the bump stops and it looks like it clears, not by a lot, but it does clear.