Simple Queation: What's the difference in Stock SC H/Gs as opposed to other Ford 3.8 engines. The P/N very which make It appears there are differences.
anyone know?
The first picture below is a 89-95 NA head. The second is a 99+ Splitport head (which has the same coolant passage layout as the 89-95 SC and 96-98 NA heads). Notice the difference in the coolant passages.
Ok, I can see why the others won't work. Now my question is how come the N/A head looks like it flows more coolant more evenly around the cylinders?
Maybe I'm not seen the pictures as I should...
Keep in mind, coolant evenly around heads is restricted by the gaskets. If you see the gaskets they block the various ports in a staggered way to help keep a constant coolant pressure through the system to keep things circulating.