Originally Posted By csk
I would not use the 1009 gaskets,
iagree
Those head gaskets are for the 4.250 bore 426 and 383 wedge motors, not the larger bore 4.340 400 and 4.320 bore 440 motors scope
The regular, cheaper, 8519PT Fel Pro head gaskets will work fine for your application up scope

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)