1977 GMC K35 Engine: 5.7L V8; Water Pump to Block; Composite;. 1977 GMC K35 Engine: 6.6L V8; Water Pump to Block; Composite;. 1978 GMC K35 Engine: 5.7L V8; Water Pump to Block; Composite;. 1978 GMC K35 Engine: 6.6L V8; Water Pump to Block; Composite;.
