[Captainfab]

You can simply purchase the 1970 Buick Estate wagon master cylinder at your local auto parts supply. The A1 Cardone number is 10-1363. O'Reilly's among others carry A1 Cardone parts

Originally Posted by pmeyers

Thanks for the additional information. Either use what I have as a core toward a 67-70 truck booster/master or find a 1970 Buick Estate wagon power brake master. The search continues....