See, this is why I frustrate my wife so. I answered the exact question asked. She hates that.

So, the full answer is that ANY 240 body CAN accept a B20 as long as you have all the parts from 1975 B20/240 to swap in...without modification. You are just swapping parts after all. For most cars you would have to have the engine and transmission x-members (I bet the trany x-member is the same as the late 140's), the bell housing and maybe transmission, some way to hook up the fuel line, the entire injection and ignition system from the B20 unless it is already K-jet then you might be able to make it work, most likely the speedo cable and head unless you put it in a car with the VSS in the pumpkin, maybe the front drive shaft section...and host of stuff I have not thought of.