318 Poly Stroker Crank & Rods

For now I'm really looking for advice on the crank and the rods, in terms of quality, strength, weight etc.

For your intended power level a cast crank will be fine, rods are no worries eather. A stock Poly rod is around 726 grams, not real sure how that compares to the scat rod, a catalog look up will tell you that