New to me P337 - Is this a problem?

[Rule303]

An example of the settings before adding fuel to rear to cool are:

RPM both 2460, MP 30 both, FF 85lbph both, Front CHT ~375, Rear 400.

Even cracking the cowl flaps is costing around 8kts, and as we are getting ready to ferry trans Pacific, 8kts makes a bigger difference than an extra few gph.

All the baffles look to be in their correct places, and a 337 experienced A&P said they are fine, but he also said that this is normal.

My reading of the forums and your responses suggest it's atypical.

Re the type of monitoring, temps are via the original gauges, and she has E.I. Graphic Engine Monitors and a Shadin FF.