The heads cast number is 3462346, anyone want to help clarify what kind of heads these are? My biggest problem in designing this motor is the fact that it's a four speed running that massive AC pump on the front of the motor. I do want to leave the AC on cause that will come in great handy down here in south texas (gets awfully warm). Here's a pic of the underside of the car as well, just to give an idea of how well this car was taken care of. That is the factory exhaust system put on by chrysler in 71' and I think I can re-use it as well. Sure glad this was a So. Cal. car.