This may not help much, but if you are running a single plane intake, changing to a dual plane will help your low end but may take away some of your top end. Also your rear end ratio is high even for that car. I don't know about later years but in the 64/65 Galaxies which were heavy cars, Ford put 3:00 gears in them stock and you could order down to 3:56 very reasonable. I ran a 418 stroker in mine when I had it with 3:27 gears and a single plane intake and it was sluggish and the 5th gear was worthless for anything but cruising at 70 MPH plus. If and when I ever get my Coupe back I have a 408 stroker in it with 3:56 gears and a dual plane intake and it is great around town and still has a reasonable top end. Not anything like the 180 MPH plus cars here but it will get me a ticket in a hurry. D.V. has good advice and you should listen to him and what the rest have said. I also had the horsepower on mine cut down from around 530 to around 470 as I don't race any more and to be truthful, just driving it I never noticed the difference. Good luck on whichever combination yo decide to try, but lower rear end gears will give you a quick feel of the pants feeling.
Ron
