Remember to use distilled water with that coolant and it will help prevent mineral deposits and it is cheapo. The good Robert Shaw type thermostats have been tough to find --guess they are no longer--Mopar Perf had them but I noticed they changed over to the cheapos for that same part # Mopar RV engines always had a notice about using that good stat with a warning about over heating if you did not FWIW--I have more trouble out of thermostats these days than ever before--I check new ones before installing--lots of good threads here in the past about not drilling the little hole or for sure not making it very big--