1759VBP GEN I SBC with Vortec Bypass Port y block GMC Truck (with AC) applications

GMC Truck (with AC) applications

Fan CFM Range: 500-599

F81Z8501AARM

9L plymouth pb300 van 1974 V8 440 7

3L International 3700 1994 444/7

1759VBP GEN I SBC with Vortec Bypass Port y block GMC Truck (with AC) applicationsMore Power. More Heat! Flowkooler pump 1759VBP is designed for Gen I SBCs with Vortec heads. Unlike internal bypass passages found in older blocks the Vortec blocks and heads do not have the internal bypass passages so the the coolant bypass is an external hose connection from the water pump to the intake manifold. You run a bypass hose from a bung on the top rear of the water pump to a matching threaded port on the intake manifold to ensure