Here's a positive update:

I purchased and received the Evolution 58 with the 201 carb. I'm running a custom header at 16 inches on an MTW RE2 tuned pipe with a Biella 24x10 prop. I'm getting 6400 static on the ground, the 24x10 is almost ripping in the air, it's perfect. The power curve, mid range/transition is excellent and its very quiet! I litterally installed set the needles and have been flying with 3 flips since day 1. The extra weight of the engine was advantageous to counter the weight of the long exhaust. I have to give it full props, I love it.

Fly hard!