Flying U

Looking for 2 port air cleaner, the brackets and tubes for 285 engine for R model

I have a 2003 mack granite has the 460 in it, the oil temp is very hot bringing the coolant temp up to the point the overheating alarm comes on. Also takes long time to cool back down. Checked fan and coolant levels any suggestions or anyone else have this problem?

2003 mack granite cv 713 oil temp getting up over 250 which is bringing water temp up causing trk to over  heat on bigger hills. Literally just did oil change on it and went out monday trk overheated about mid day. Fan seems to be wrkn can hear it come on and off. Trk cools down at an idol or when engine not under a load. Blew radiator out. Any thoughts? I was leaning towards stuck t- stat but shouldn't oil temp be kinda close to water temp seeing it gets cooled by it?