Need a solution for a problem.

So I installed an 8 3/4 3.55 sure grip in a 1966 Dart, behind my slant/ a833 od trans. When launching in 1st, the car hits 4 grand in a few seconds with little distance to show for all of the noise.

In other words, the car is torquey in 1st but the distance traveled from launch to second gear is less than what I had with the 7 1/4 2.92 gear. If that makes any sense.

Clutch is not slipping, brakes not dragging. Just seems like the little 225 needs more rpm's but it just runs out of power around 4 grand. I'm running hei conversion, new 500 edelbrock, adjustable vacuum secondaries( maybe I could play with those). Throttle cable is adjusted correctly.


The only other mopar I have owned was over 30 years ago, 68 coronet 383 auto 4.10, so maybe I'm expecting too much out of the 225.

All considerations in a modest direction will be appreciated.