The Stovebolt Site Forums The Parking Lot Big Bolts 1966 GMC 960 from grain truck to tire truck.

The big hose that loops to the driver's side is a thermostat by-pass hose, circulates more water in the block as the engine is warming up to make the temps around the engine more equal. Also I believe it is supposed to help with hot spots under heavy loads, more water movement in the block and heads.

I pulled the oil tube from the old 2 barrel manifold and brazed it into the newer style cover. keeps the old style breather cap and looks more like the original setup. Anyone in the know sees it but that is not many. Looks better than a rubber plug to me.