As I have stated, I want my car to be driven on the street and
1) I want to be able to cruise at 70 to 75 mph on the highway.
2) My car will be taken to local car cruises and
3) I do not want it to be a push over. I do not intend on drag racing the car, However,
4) I want the car to accelerate and smoke the tires in first and second gear with my pushbutton 904. My car is a 64 Dart GT/225.
With 3.55s and about a 79.5 tire circumference,
75mph will be 3540 rpm
First gear TM,(Torque Multiplication) is 3.55x 2.45x24/25.5=8.18 corrected to a 1ft radius, so no, you will not smoke both rear tires in second gear, nor even in just first gear with the factory TC and stock engine. You will need waaay more rear gear AND a higher than stock stall TC, and or more power.
If you want all of the above with a 225 automatic................ yur gonna need 2.76s and a turbo... maybe two of 'em,lol.
So IDK if yur yanking my chain, pushing my buttons, or what but; "for real"?
IMO;
with a slanty; to cruise at 75mph, you're looking at 2.76s for about 2750@zero-slip, maybe 2860@4% slip. And to smoke both rear tires to 48mph (top of first gear with 2.76s), never mind to the top of second gear,(85mph @ 4500rpm), you will need a MINIMUM 200 crank horsepower, probably more like 300 to smoke tires in second gear beginning at 48=2700 in second .To do both Normally Aspirated,you're dreaming.
Pick one.
To spin to redline in first gear only; I suggest 3.91s and a 2800TC and forget hiway cruising, because; 75~4000rpm
If you need the 75mph, forget smoking tires. With 2.76s (75~3540) there will be no more chirping tires either.
Pick one, or go supercharged.