Holley 750 hp vacuum secondary or Holley Double pumper?

PG Duster said

Thank you guys, it sound like the HP 750 vacuum secondary is great for street strip. I need to Make it a little richer for the cold start.

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No, the choke does that for you.

Will the mechanical secondary et or have the same trap speed at the drags as a vacuum secondary carb?

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No, it should be possible to be quicker with the DP. A minor amount, but yet there. The thing being is you can open up the secondaries quicker. One of the things about a DP is you can open them up to early. This you’ll learn by feel and/or drag strip testing.