No BULL please, and no THEORETICAL top speeds please. I've heard all that. What is the fastest anyone has taken their 410 equiped Mustangs up to? What is the RPM's in 5th gear once you have reached the limit? And for that matter, how about guys with 373's? What is the top speed and at what RPM in 5th do you run out of steam? I have 373's and haven't had the nerve or the place to top mine out. Thanks.