That's what I thought, but I wanted to be sure. What about the flex plate? I know that the torque converters are different too. I remember running a starter from a 440 on my slant 6's, direct bolt on / hook up
Flex plates are the same between the two. The 360 has weights on the converter and the 273/318/340 do not with some exceptions. The 73 340 got stuck with a cast crank so it had a weighted converter and damper. When you get up to the magnum stuff I don’t remember what interchanges and what doesn’t.