360 Advice Needed - Autocross / Street Engine Build

There's at least some, when I did the cam break in I had the rad cap off to get any air out, and you could see the water circulating.

It's a new 180° thermostat, and I boiled it to check that it's working. The cap is holding good pressure, and it's a new rad with just distilled water so far.

Will get some temp readings tonight on the:
- Upper & Lower hoses
- Radiator core
- Thermostat housing
- Headers
- Block

Hopefully that will make something clearly stand out...

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Also will order the fan shroud from Mancini, haven't had any luck with used ones coming up in the last few months on FABO.

Looks like 2998 325 is the correct one.