904 Shifting Points help needed

I have a 74 Dart Sport with a 360 and am having shifting problems.

It is a 904 with a Hurst V-Matic shifter. It also has a Lokar downshift cable on it. I don't know what converter or shift kit is in it. Engine and trans both look fresh.

Don't have a tach so doing my best describing this...

From a dead stop in drive it will shift from 1st to 2nd at about 22mph pretty much regardless of rpms.

But from 2/3 it winds up and the only way I can get the shift is to let up off the gas for a sec and then it will shift...hard.

This is my first Mopar in 25+ years so don't remember much...is there an adjustment for this..vacuum modulator etc?

Fluid is at proper level and it shift fine when I use the shifter manually.

Thanks!

Brian