c5 manual master clyinder?

[blown 67]

I have a complete C5 front and rear set up on a 67 camaro that was originally a drum/drum car and I want to keep it a manual brake system. My question is what would be the best master cylinder for this type of set up? I have herd of people using a early vette mc with a 1" bore, and people also using a 15/16" bore master cylinder as well. Which would be the best choice? Also does anyone know if I am going to have to change my push rod length with the master cylinder swap? Any help would be greatly appreciated!

Thanks
AJ