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Home >> GMC >> 1974 >> Magnavan >> Repair and Diagnosis >> Engine Performance >> Specifications >> ROCHESTER Models 4MC & 4MV 4-Barrel >> Overhaul >> Reassembly >> Vacuum Break Installation

Vacuum Break Installation

If vacuum break diaphragm was removed from bracket, slide vacuum break diaphragm between retaining ears and bend ears down slightly to hold assembly securely. Install fast idle cam on vacuum break assembly.