A fellow in the east, is using them in his 62 Impala 409 drag car ( high 9's:eek: ). He gave me MUCH advice on parts selection, including what springs he uses. He said the ones to choose are the set for 69 Camaro with big block/ iron heads.
I've installed them in my 62.
With no wiper system, no heater system, no options, little rad, aluminum flywheel, clutch, balancer, water pump..... car sat too low.
I have inserted two adjustable spring spacers in each. at their lowest possible setting, the car is a little too high right now ( here's a picture taken yesterday ).
I'm going to grind a bit off the inserts, and bring the front end down about 1/2" from where it is now.
Simple answer to your question...
If your car is near stock weight, there is no out-of-the-box Moroso spring that will work