CR Spring Replacement/ Load Rate

[HPCOBRA]

I posted once before and got a lot of good info. Now I am ready to change the springs in my CR. The mustang II suspension came from a 6 cylinder donor and the springs are weak. My car has a 460 with cast iron heads and a Richmond 5 speed. The intake and radiator are aluminum, but that does not remove a lot of weight. My budget does not allow for aluminum heads or coilovers so I can save you from suggesting that. I researched what springs are easily available and the they are Moog-8556. They are referred to as 425 pound springs. At installed load height they are rated at 1561#. People have suggested that I go with 500# springs. I only found one source and they are much shorter springs. I spoke to the vendor and they agreed that it lowers the car but the suspension is much firmer. I do NOT want my car lower. My bell housing and oil pan are probably no more then 4 inches from kissing the pavement now. All comments are appreciated... Thanks

[Double Venom]

HP.
If you contact "Blue Coil" they will have your springs or make what you need. 500 lb. springs are a little stiff, Maybe 425's or 450's? (For a CR height should be right at 11"s.)

Sorry I don't have their contact info anymore but they were a great sponsor for the Spring Flings!