Unported head quickness?

I started out in a heads up street car thing in my Dart we are talking late 80s I’ve had this car that long. Car ran 6.90 in the 1/8th
Class kind of fizzled out after 2 years.
Track adopted some heads up bracket deal 8.0 7.0 6.0 and so on, and the car would run 7.0 all day so there’s my class.
I ran that class with a 340 I drove half the time to the track 40 miles one way.
Stock ported heads, stock block, crank, rods, or course new bolts, trw replacement forged pistons. .557 cam for a decade.
Car is finally going back together with a new engine that should run 6.90 on the motor, probably mid 10s
We will know soon! This is just the break in engine. I have another I’m working on also.

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