Magnum manifolds are on my 64 valiant wagon. They are off a 94 dodge van that the 360 came out of thats in my car. I have schumaker urethane conversion mounts. I had the manifolds machined on the mating surface . The thickness of the gaskets is all they took off. I ground off all the casting numbers so i couldn't tell you what they were its been several years ago when i did this. I also had to change the steering joint to a universal one i picked up on ebay. this set up has been my daily driver for about 8 years now.