Even with a 180F thermo plate on your oil cooler, you'll probably still need a blockoff plate for the front. Mine's only a 19-row Setrab, w/ 180F thermo plate, and I still use a full blockoff plate (no drilled holes, full-size) in the winter down here in SE Texas. Without the blockoff, a mid-december highway drive (especially at night) can suck the oil temps down to ~150-160 and hold them there.
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