I will call Speedway and inquire about the Vortecs. The local Chevy dealership is a laugh for technical advice. I will go with the Rochester Quadrajet. One rodder told me the reason he didn't use the Q-Jet is because the Q-Jet bowl empties with hard acceleration but the Holley doesn't. I know that Ford used the Q-Jet on the '69 429 engines because they could deliver the $.50 gas better.

Thanks again for the advice.