You're stuck with what ya got.
A good upgrade while you have the wheel studs out is to swap the 1/2" ones for some 9/16" pieces.
If you want to get closer to peeling your face off the windshield, when you do the rear, swap in some 1-ton brake shoes and 1-ton Chevy wheel cylinders. The 3/4-tons only came with 2 1/2 inch shoes in a 3 inch drum, the 1-tons had 3 inch shoes to match.
Raybestos 413PG/ NAPA TG358 shoes
Raybestos WC36057/WC36058 cylinders