I doubt it, an upsized 372 is 77cc (upsized from 71cc). Of course, they could have just bored out a 372 big bore jug another 2 mm to make it bigger. The 77cc jug needs some work to get it to flow like a 77cc jug. If they did bore it bigger, it would need a lot more work to get it to flow properly.
That said, I've seen some newer pistons that have less restriction to flow at BDC due to the curved shape of the area under the wrist pin boss. With a properly designed piston and a bit of work on the lower transfers, you could get a 372 out to 82cc and still have the transfers flow for the 82cc displacement. - that would make a neat 'sleeper' of a Chinese 365.
As far as torque for that series of a saw, a modded Zama would give you much more 'grunt' than the extra displacement. If you can find a 'twin jet' Zama and have Poleman mod it, I think you will be surprised at how strong the 77cc saw can be made.