Red 409 63 impala
Well Known Member
I have a GM 409-425 intake manifold that the fitting from the water pump hose to the intake manifold hose hooks up to. It appears to be a screw in fitting. I also have 409-400 hp single carb that uses a press in fitting.for the bypass hose.Has anyone replaced this press in fitting.it looks like removing the old one might be difficult. Show cars sells the fitting so others must have needed to replace it.