the 94-95 A-body 3100 code was actually used on early 94-95 W-body 3.4 PCMs as well. later 94-95 W 3.4 changed to a different mask, but i've never seen a 94-95 A 3100 use the later mask.
a 180 thermostat is entirely unnecessary on these engines, but reprogrammed fan points are never a bad idea.
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