Hi Chris, and welcom.....
I can respond to rear engine temp. I have a 77, 337 G normal asp. My JPI, eng. monitor shows that the rear engine cyl temps run about the same as the front temps if not a bit cooler. The front has about 1500 hrs and the rear about 150 hrs on a fact. reman.
I have never had mine on grass and I will be interested in the replys on that. Guy....old72driver....
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