Nobody else has answered so I will jump in with my 2 cents.
I have not tried this myself with the Blackout hardware but others online have.
If there is a 6v cooling fan on the ESC and you power it with the 3s power it will live a short life.
Either take power for the fan from the receiver or upgrade to a 12v fan.
3s will put more stress on the pieces that are already marginal.
Pinions and spurs - plan on having spares of these.

Edit: btw, where in Ohio?