Is Wix the OEM oil filter?I would want to know what temps you are seeing with the belt routed correctly. Any 'new to you' vehicle should be flushed fully.
You may have dodged a bullet.
Rotella oil
Wix 1515 filter
green coolant
new fan clutch
radiator service/replace
new t-stat
new fuel filter
ngk BPR6ES plugs
8mm wires
air filter
And great list - exactly what I did with new to me D1.