If you are going to keep this truck "in the family" for many years, here are SS brake line sets:

Chevs of the 40s - $170
Classic Parts - $170
Jim Carter - $170
Also, check out Inline Tube and Classic Tube - the vendors above often buy from them.

Check prices of wheel/master cylinders at Rockauto.com & NAPA.

Classic Parts & Jim Carter aften give a 10% discount.
Chevs of the 40s might give a discount on a large order.

Classic Parts often gives free shipping for big orders.

It never hurts to ask for a discount.