Hard to really tell in the video but if it is a header leak, you should see some black from the area of the leak. Maybe a leak at the collector gasket?
Did you try the long screwdriver to the ear trick to try and pin point the sound or an automotive stethoscope?
For my 73 Barracuda, I did what Challenger RTA said for the front. For the rear I agree with pschlosser, rear bumper, bumper guards then rear valance. I know that if my valance is on, with the dual exhaust, I cannot access the rear bumper bolts easily and when adjusting the rear bumper, you will...
I also bought the kit to rebuild the steering coupler and found that the only parts that were worth using was the rubber boot and the metal top cover, my original was too bent and unusable. The shoe's were smaller and had to much slop and the new shoe pin was also smaller. I did purchase and...
If you don't have access to a press you can use a vice to force it through most of the way. You may want to heat it up also, that may aid in the removal process. Put a metal/steel block with a through hole one one side and let the vise press on the other side of the pin. If/when the pin moves...
I had the same problem with my emergency brake pedal after I refurbished the assembly. If what Chryco Psycho said to do doesn't fix your problem, then a small spring may have broken or become disconnected inside the pedal assembly. Sorry I don't have my pictures to post, they are on a thumb...
I know I don't maintain a thermostat. The moto of don't fix it if it aint broke isn't for everything but if the thermostat in question is working and he is not over heating, then...