Opinions are like belly buttons--everyone has one and mine in this case is a turbo makes more sense for most older engines with a few exceptions. If the main bearing count is one higher than the cylinder count then a Roots or other positive displacement superchargers are a consideration but with most older engine bottom ends having the boost come on at a higher rpm rather than just off idle prolongs bottom end life. I agree that the turbo is more involved to set up.

Evan