Picco 26 is the king here. All you REALLY need is the center section of the motor mount from ofna. Of course you may want a pipe and clutch too with all that power. It'll make that OS 21 look silly. I have yet to own one but soon will. You could also try a sirio s27TX. I got mine on ebay for 159. Add a trinity mount and a good THS or RD logics big block exhaust and your done. They have the s27RE for revo, but it's 100 bucks more. You may need a tekno throttle linkage too, I didn't try my stock one on it. The stock e-z start or pullstart will fit both. I love the s27 because it is very powerful, easy to break-in, holds a rock-solid tune and has not shown any signs of leaks or tuning issues so far after 1.5 gallons. I've never had an engine this easy to use so far. I will be changing the crank bearings in the next gallon or two, but this will be preventive maintenance.