I dont think your asking too much but you'll have to fall somewhere in the middle. I know a guy that runs high 12's with a 3:08 rear but he does have a well built big block chevy in the car and the suspension is set up more for the 1/4. I would think that you could use somewhere betweem 3:31 to 3:55's to get where you want to go. Now you probably wont be lifting tires off the ground but at least it would be respectible. When it comes to 1/4 mile it's all about hooking up, If the car dont hook then it dosent matter what gears are in it. If you go towards the 355's you'll get better in the 1/4 and off the line (if it hooks), if you go towards the 331's you get more of a hwy racer. You'll have to make that choice. If you are going to flog this car from time to time just remember it's only as good as the weakest part, you may want to upgrade to a 12 bolt or ford 9" (i know the nasty ford word). From there is just gets more expensive LOL! Just my 2 cents, hope I helped a little, Nick

67 Convertible