Latest research proves the old 185 internal temperature is not needed. Recommendation now is to set oven at 325 or 350. When meat thermometer reaches 170, your pork roast will be fully cooked, juicy and tender.
Carlin, Agnes F.
"We've Changed the Rules About Pork Cookery. Here's Why!,"
Iowa Farm Science: Vol. 20
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol20/iss11/4