Car ran slower then expected.

I run the Carter high volume mechanical fuel pump on my 64 Sport Fury. Been 12.12 @110. Don't have all the issues that come with an electric pump( wiring, rerouting fuel line, mounting, etc). I would leave the timing alone for now, and upgrade the pump, and switch to the Holley, but take some jets and squirters to the track with you, so you can see what the car likes.