With a water cooled engine, heat build up down there isn't allegedly a factor.

Since my belly pan is off and I have one of those laser point temp/heat reader thingys (Harbor Freight, $20), I'll take a few days of data on different points on the underside.
When I get a bellypan, I'll do the same.
I'll have to use points I can see with the bellypan installed to create a similar data set.

Cheers,
Steve