I ran a 380 crate 360 with a 904 in my Dart convertible, it really scooted! The new owner finally put an 8-3/4 in it with 3.55 gears, I bet it was MUCH faster than the 274 geared 7-1/4!
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
The new owner finally put an 8-3/4 in it with 3.55 gears, I bet it was MUCH faster than the 274 geared 7-1/4! 
