Extra power.. I highly doubt it. At 25 to 30lbs weight, you will have scale power from the 7-77. My 190 could use a few extra hp.

Fuel consumption is great. A 6 to 7minute flight only uses around 12 to 14ounces of fuel.

I wouldn't use standoffs. The engine is allot of weight to hang on only 3 bolts with that much leverage.