i want a muscle car that is driven hard. Cant run a 4 sp with steep gears on the street? Why is that?
I run 4.30's in my STREET DRIVEN cuda. 3000 rpm at 55 mph, or 3200 rpms at 60 mph is no big feet for me. thats right where my converter is solid.
if I calculate the cost saving from mileage going from 3200 rpm at 60 mph (9.5 mpg) to 2300 rpm at 70 mph (11.0 mpg if im lucky), I'd need to drive about 150,000 before I make up the cost of a $5000 overdrive system.
I didn't say you couldn't drive a car with steep gears on the street,.....I said your limited to the street!........
How'd you think your 4:30 gear cuda's motor would, if it COULD?, hold together at a 140 MPH!.......I'm running 4:10's in my dana, in my Tona' with a Keisler TKO 600/650, .64 OD.......I can turn 140 MPH with 4:10's.......could you do that?
Gas mileage?.......hows a maximum of 22 MPG with a 450 HP 440/6.....consistently
If you have to "ring" out your car at 6K plus to get it moving 
.........I think taking advantage of gearing, means less wear and tear on an engine,........And if you think 5th gear is useless on the track.......trust me, I've used it many times
If you enjoy your 4 spd,.....good for you, different strokes for different fokes
