I'm aware of the 215, it was all the rage in the early sixties in the F85. It was turbo charged and water injected. He just said 3.8 and I assumed he was talking about the V6. It was a neat engine.
I remember seeing an article in a magazine several years back about interchangibility of parts and hop up parts for the little V8. I don't think the engine needs to be THAT compact, and I expect stuff would not be very readily available as a small block Ford or Chevy.
Have a great day,