If your build is moderate or less (500hp or lower) go with the Schmacher, they fit easier and don't capture nothing (use a mini starter). If you're going for the throat then TTI's no question.
So you are running the Shumachers in your 383 Demon?
Is your car auto or 4 speed? I'm going with a 440 and a 4 speed dana mini tubbed on my '71 Demon and it will be about 500 hp and mostly a driver.
Are yours coated or chrome? does it matter in the long run?
Just curious.
Tom.