Shorter tires, no thanks
To get your best ET you need the tallest tire you can safely fit under the car, then gear the car accordingly
My 68 Valiant has a 30” tire with 4.56 gears. Still streetable and launches like a rodeo bull on the track
After some research tho I’ve decided to not do any mods anyway. I plan to leave the car 100% stock…. for a while
You do realize that a 2.62 geared Hellcat actually has more overall gear than your Valiant with 4.56 gears.
Valiant with 727----4.56x2.45=11.17
Valiant with 904-----4.56x2.70=12.31
If you are thinking of doing it for street fun and don't care about traction. Then I see the diff swap may be a good choice.
If traction is an issue and drag racing is the goal. Then keep the 2.62.
I have yet to be outrun in the 1/4 or 1/2 mile by another stock cat with a 3.09 gear.
Actually the 1/8 mile is about where my car starts being quicker than the others.
I know many or most don't agree with this.
That is ok with me as I am sharing my experience and opinion.
If you are using a 2.62 and cutting 1.6x 60' times on a good track. Then the 3.09 will likely be better.
If you stick with 2.62 and learn what the car likes then the 60' times should be 1.50x to
1.58 depending on weather.
Good fall air around 0 DA or better to summer at 3000DA.
Get to this point and the only gains from a 3.09 will basically be 60' times.