I flew mine for the first time a couple of days ago, by accident.
I was doing some ground work when it simply took off at 1/2 throttle.
I run a 25cc Toro and a 15 x 8 prop. The engine is still breaking in and turns about 7700 to 7800 rpm.

The plane was tail heavy and I managed to land it on the runway.
But it was an intence 60 seconds. I hate maiden flights.

So yes it should fly with the Mac, but you may want a little more power.
There is a 32cc cylinder that fits the 28cc engine if need be.
Plus a Bowman ring will make a big difference too.

The first thing I would do is check the ring gap. My 28 Mac has a huge ring gap.
And will run much better once I put a new ring in it, even the $5.00 stock one.
I just don't have a use for the engine right now.

Keep us posted and pictures are always nice.