...I never did any of these modifications!! What I DID do was Disconnect and Cap the air bleed hose from the Radiator. I raised the Pressure Tank Much Higher 4" Taller to create a Air-Trap (See Pic). This traps all air in the system and is bled out to the over flow tank...the result is when you open the Cap after a cool-down, and water is re-filled from the over-flow tank...water spills out, because the pressure tank has been Automatically Filled to the Brim, Maximum. This is how the system is suppose to Work! NO Need for all this 'raise the rear of the car' etc.! Air was bled at the Radiator by loosening the capped banjo fitting, Twice. The second time after a Cruise. All air is out, pressure tank 100% Full.
Also, and this always causes controversy here...I changed the Direction of the Flow through the Radiator. As in Thermo Physics, heat rises...I connected the Flow to the Radiator to the TOP inlet and the Return to the Engine, of the Cooled Coolant, comes out from the bottom. Many here on the forum disagree with this??? But if You Look at all other Vehicles, GM's, Fords, Lambos, Ferraris...99 out of 100 cars connect the flow this way! The Pantera is the ONLY car that does it differently! Hot in the Bottom, and Colder out of the TOP, Already Heated by the Rising Heat. I posted this advice 10-12 Years ago and No One listened, but did all this Mumble Jumble, for air bleeding. In My View, Not Necessary!!
...Some of You on this Forum, know I took the Kat to the Mojave Desert in August of 2019:
The Ambient temperature 118F. Sustained cruise speed 80-90 MPH 5th Gear, and I'am talking for 3-4 Hours! 50/50 Prestone Anti-Boil 180F RS Thermostat and the 'MJ' Restrictor Plate installed. 4.9" WP Pulley, Pressure Tank CAP 16 PSI. 3 Sucker fans with Shrouds running at Full Blast. Engine oil cooler running with fan. Air intake box, NOT pulling engine bay heated Air. NO Pinging excepting, When I really Pushed it up a Hill. 91 Octane Fuel, 10.5 CR.
The 351 Cleveland Never got Over 195F. There's Your Proof. GODs' Own Truth! Take it FWIW.
MJ