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.
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