The EZ heads are designed for A body cars. They have stock low exhaust port location and bolt patterns. Most all standard exhaust headers will work. This also means that if you want Indy power and want to use your existing stock exhaust headers, this is your head. Like all Indy heads, the EZ head features the long valve design and cast aluminum valley plate. More intake volume (270cc 440 SEZ) equals more power.
The 440 EZ-1 is the same as cast head as outlined above with the intake opening machined to the Max Wedge size and CNC bowls. This allows all Indy manifolds to be used or all after market Max Wedge x-rams. Both SEZ and EZ-1 use standard Chrysler rocker shaft oiling. Standard low exhaust port.