Valiant Newbie

Hello
Desire to relive childhood days with my Dad - and learning to drive in his Valiant , led to......
Just acquired a 1960 Valiant SUBURBAN Wagon from original owner
one repaint - original interior - one drive train swap - still a 6 but with 3spd in floor
Sitting in a garage 18 years
Would appreciate any advice / suppliers / etc to :
complete brake redo
gas tank (sat 1/2 full entire 18 years)
wheels & tires - sitting on factory ones- read an old article suggesting 15's ride better
would really like to redo entire interior
Thanks for any help !
I am excited to be part of the group