After playing with Chevys for years and switching to Mopar I ended up with a spare 427 Chevy engine and an 18 spline Mopar 4 speed transmission. I thought I would do one more project and put them together. I bought a 73 Camaro Rally Sport (very rough) re-skinned the whole car, put the 427 in it. I read an article where in the late 60s drag racers learned that Chrysler 4 speeds where stronger than Muncies and figured out how to put them together. So in looking for the adapter I eventually found that Passon Performance makes them still. Bought one and sure enough it is a cake walk. Now I have a Chevy that burns rubber like a Mopar!