1963 valiant front runner sizing suggestions needed

How much clerance do you have to the spring and to the rear quarter with 5.5 back space? Thanks. Eric
Took some measurements and have 1.5" to spring and 1" to quarter panel lip. With wheel movement up, this 1" reduces to about 1/2" as the inner part of the quarter is closer than the lip.
RR Valiant 4.jpg RR Valiant 1.jpg RR Valiant 5.jpg