Slow 1/8 with 74 440 dart

it doesn’t sound like you made more than a couple of passes.

My suggestion would be to get a handle on the timing curve situation…….. and go make some more runs.

Although the “combo” isn’t perfect……. It should ET better than it does.
Part of the “problem” with a new driver in a new combo is the lack of familiarity with the car.
Like most things in life, it takes practice to get good at it.