5 quick operation and Maintenance Qs

May need more fuel yet, you have had the head shaved for the valve job. Who knows what else has been done to the block and head in the past. If the exhaust has been modified larger than stock it'll need more fuel and your intake (air horn/filter) has plenty of flow. I'd try a 61 or even a 62. If the fuel has ethanol it is gonna want more. And we drive A LOT faster now than the 55 MPH these cars were built for.

As for the gauge changing with engine RPM/alternator output- I'd make sure you have a constant voltage to the gauge. Any fluctuation in "reference" voltage will change the reading on the gauge. I've personally never used an electric Temp gauge other than the OE parts on the vehicle. I'd go with one that has a "mechanical" sensor. No power required, so no change in reading depending on battery/alternator output.

Fan will be in the mail for Tuesday. I'll get you my E-mail for pay pal.