Help with dampener ID

Can anyone help identify this dampener? It's on my LA 360 which was built years ago by an old time Mopar racer who I can't get a hold of. I'm trying to install a 2 groove crank pulley for power steering. The engine has non A/C aluminum water pump and alternator brackets. A pulley set off a '74 318 won't line up. The dampener is too thick and the crank's groove is approx 1/2" offset from the water pump's groove. I need a crank pulley that is 1 1/2" from the dampener face to the center line of the inner V belt groove. I've seen some early 340 crank pulleys "on line" that look right, but? Obviously I'm missing something in my Mopar knowledge base!