Only thing I would do different is use a 180-190 thermostat. 160 will never close to allow the radiator to do its job.
Make sure you have a good fan shroud. Make sure using correct fan and if you have a fan clutch make sure it is working. There were some rubber mastic pieces covering the open space between radiator core and radiator to insure air wen through radiator, make sure they are in place.

If you have a 400, make sure all the baffles in place, upper and lower.

There are other things that causes over heating such as Timing and engine specifications..

Duplicolor DE1616 Will work if you want to use Duplicolor paints.

Studs are screwed in. If it is stripped you can heli-coil it.

If the plates are all corroded or other issues, they make new stainless plates which may be better.