Some cases seem to use more effective cylinder base gaskets than others. I currently have an '86 3.2 and a 91 3.6 case disassembled. The 3.2 uses a simple flat base gasket while the 3.6 has a groove, flycut into the case wall for an o- ring gasket.
Why, the different designs, does the 3.6 pressurize the crankcase that much more, or is it an example of the factory engineers over designing something(probably not likely), does it make any real world difference, is it a track only thing?
