wrong

So A very nice guy gave me a elitemodels 8mm epp acrocub kit, but it is just the foam. it recommends a 2206 -1900kv motor with a 8x4.5 prop but I thought maybe I could just get a flitetest powerpack and not buy things separately. The powerpack F has a 2205 2300kV motor with a 6x3 prop, and I am...