Why are you refusing to check the temperature gauge?
Running an engine inside a garage for long periods, without good airflow could cause an engine to over heat. You should have a fan set in front of the grill or better yet, drive the car and see if it is actually overheating.

>>I had it timed several times.<<

You had it timed? Get a timing light and a tach.

Take the cap off and FIDDLE with the rotor? NO. Connect the timing light, rev the engine and watch the timing as it advances.

If the hose is kinked, fix it, don't debate it.

Check to see if the engine is actually overheating and check the temp gauge.

Attached Images
Engine New.jpg (58.92 KB, 23 downloads)

'67 GMC 3/4 292 4spd