I was happy with my set up but I went with a larger turbo and now miss the torque I had at lower rpms, although the power is great once it's going. The torque isn't bad but without boost small motors aren't stump pullers. A larger engine with the same turbo (T72) and power potential, I will have a larger usable power band. Concerning a 7M and 5.0. If they are both equally prepard, both turboed, the 5.0 will make more power and would be a better choice IMO, it's the dispacement thing. A completely stock 7M (stock turbo, fuel, ect) with just a little more boost is good for mid 350rwhp easily. 450-500rwhp with a slightly larger turbo and fuel and still pretty decent spool.