This is the first of our series on building a blow through carb using a regular Holley 750cfm mechanical secondary. I did a terrible job filming this but the I will summarize and provide affiliate links to the parts. To make a carb work with low boost is pretty easy. start by removing the choke and epoxying the hole in the main body closed where the choke rod came through. Remove the main body from the throttle plate, nock the power valve check valve out of the throttle plate then drill tap and plug it. If you have brass floats replace them with nitrophyl floats. Remove the primary power valve, drill the power valve channel restrictors to 0.080" and install a boost actuated power valve. If you have a secondary power valve plug it.

Boost actuated power valve https://amzn.to/3DesNHA

Front nitrophyl float https://amzn.to/3xG0roK

Rear nitrophyl float with jet extensions https://amzn.to/3rq8ZyJ

Epoxy https://amzn.to/3d4HR05

Popsicle sticks to mix the epoxy https://amzn.to/2ZG6QDE

Pin vise and small drills https://amzn.to/3G3yuKl This is garbage but it gives you an idea of whats needed. I will be changing this in the third video of building a blow through carb when i turn the boost up.