I'm sure there are many great engines out there.
I have a Roush 427R with a little over 10,000 miles now. It was an easy break in period for about 1000 miles. I take particular care to keep the
oil changed every 500 to 1000 miles, run the proper fuel and always warm engine with easy driving until
oil thins down before any type of spirited driving. It might sound like overkill, but I think it makes for a long lasting investment that way and is probably a little better performing engine too. I also took time to have the carb tuned properly for the air in my area. It hammers and I'd do it again with Roush. Most my driving is around town for a cruise, but it definitely is a performer. Thanks Roush