Here's what this engine build is all about. The Trick Flow Power Port Cleveland 190 cylinder heads provide the low and midrange torque capacity of factory 2V heads with the high rpm horsepower potential of the 4V head design. Trick Flow even modified the oil return system to improve oil drain back into the pan. The Power Port Cleveland 190 heads come assembled with your choice of 1.460-inch (0.650-inch max valve lift) or 1.530-inch (0.680-inch max lift) valvesprings, valves, retainers, and locks. Here, Ron slides the Power Port Cleveland 190 head over the ARP head studs. While studs aren't absolutely necessary for an engine at this power level, they tend to take and hold torque settings better than regular head bolts, and make servicing easier too, which is a plus for a dyno mule like this Cleveland. The gaskets are Fel-Pro.