The car I'm working on already has 4 wheel disc with small booster and it stops worse than the drum brake car I have. It has g m type calipers - front rotor is 11 inch. I put it on the lift and put it in gear -found out the rear axles are bent so I'm gonna replace that. It was pushing the rear calipers back and causing the pedal to be spongy. How big can I go on a booster? It's a small block with aluminam valve covers.
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