runing out of idea´s on what to improve

Convertor and gears is the first thing that hit me in the face. 3.91's are a great street/strip gear. And modern convertors will work good on the street and strip without to much heat if setup right and using the right cooler. We use a 9.5 Dynamic convertor in my boys Dart with a nice cooler. It flashes about 4200 but drives like a stock convertor and we love it. In fact I just got one for my 63. And we ran 3.91's in it. It's nothing fancy and it's a total street car that ran 11.60's with the 3.91's and 11.50's with 4.30's. So the 3.91's work very good and he is going back to them and will just run a 26" slick instead of the 28's he uses with the 4.30's. And with 3.91's and a 28" street tires he can cruise at 2800 rpm at 60 mph. I would definetly go with at least 3.91's and a decent convertor. Then go and get some baseline time slips so you can start tuning from there. Ron