You COULD upgrade to a dual reservoir master cylinder;either get one with the same bore size for a drum brake truck or use one with the same bore size for a truck with front disc brakes and use an aftermarket adjustable proportioning valve in the front brake circuit. On my '54 GMC 2 ton I used a M/C for a GM one ton van-same sized bore,works so well it feels like power brakes,and I can load more or less front brake with the twist of a knob.
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck