Holley Strip Dominator vs. Edelbrock Victor 340

If my converter is 4,000 and the motor only makes power up to 6,200 or so, that's kind of a small window for the engine to make up the ground.

I want to get this car somewhere in the 10s and MPH around 122-125. I don't know if I'm getting there with what I have right now.

4k to 6,200 is a rather large window to be locked up on the big end compared to some combo's racing, imo. Pulling on the big end should not be a problem as long as the converter doesn't have too much slip.

As to the 2nd part, i think you can get there as is, 10.99+, but the cars gonna have to 60'.

Don't know your tire/gear setup, but i ran some calc's with a 3.91/4.10 and 27" that looked about right for the 1/4 mi.

I still personally would work with what you have and get it dialed in. A manifold swap is a afternoons work if you feel it needs it down the road.