FWIW,
I have lived with my Roush 427sr/tw in my SPF now for about 6 months, have really been driving alot lately, stop and go, park it for a couple hours take another drive and in my opinion could not run better. Fires up on first crank, on cold morning chokes works perfect, staying out of the throttle ( a challenge) I get about 13 mpg. If I were not so anal about my paint, etc, it could easily be a dailey driver. I like driving it so much I am trying to figure out how to install a radio for the longer drives. There has not been a drop of
oil on my garage floor in over 2 months. The front seal would drip once in a while, I am talking 1 drop over a week, but I guess the seal wore in and now bone dry.
Go reliable, go Roush.