What kind of promoses did he make as far as prop size and RPM?
What numbers have others posted with this engine?

What was the ring gap of the old rings?

Some don't believe in porting engines some do.
Some raise the compresssion then raise the ports to offset lowering the cylinder to raise the compression
some don't.

I just had a Toro done for me by Brillelli and here is what they said after they ran it.

" I just got done running it and it had a good idle at 1750 and a top of 7800 on a Mejzlik 16x8. It will go higher with break in."

This engine had the compression raised, ported, new carb and manifold and exhaust.

I have about $270.00 all together in this engine. It only turns 1000rpm more than yours.
How often will you use that last 1000rpm?