It just occurred to me, and I did some searching on the forum and found suggestions for what to use for the foam.
I realized the 682 has solid side covers and the frame had a mesh on the bottom to allow air in. I used a 1641 frame which has solid steel sheet metal under there. So I'm probably not letting any air in to get taken up into the engine cooling fins and with the side covers off there is enough air flow to keep the engine cooler.
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1872 with 50C deck
1862 with 50C deck
1641 with 48GT deck
364 snow blower
IH Cub Original with deck
GREEN 317 with integral sleeve hitch, front hydraulic
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