Initial startup cooling system troubles

what YR said.
For break-in;
I just rotate the D until the engine rpm peaks, then throw back a few degrees to compensate for the less timing requirement once warm. Then I set the timing after the cam is broke in.
At 2500 and warmed up, the engine may be happy with well over 50*. This is easy to get with a good working V-can.
28* at 2500 is or may be, a good number for WOT power-timing, but you can figure that out later.

As for the cocoa, IDK