So if I do need a new T-stat housing, should I get the stock one
https://www.pelicanparts.com/More_Info/93010701701.htm?pn=930-107-017-01-OEM
Or should I get the aftermarket with bolt heads instead of slots
https://www.pelicanparts.com/More_Info/93010701700.htm?pn=930-107-017-00-INT
Should I buy a new thermostat while I'm at it? I imagine that's probably wise. I don't think the new housings ship with thermostats installed.
Thanks
Dave