Ken:

Send me an e-mail and I will provide the information you need to convert your '66 to power brakes using factory equipment and avoid the need to break into the system, therefore, you don't even have to bleed your brakes. The factory set-up utilizes the factory single chamber master cylinder and it doesn't need to be removed from the truck, simply unbolted from the firewall and reattached to the factory booster. It is a relatively simple modification and well worth the upside benefit of having power brakes. Please let me know if I can help.

Tony Smith
[email protected]