60 GMC on 74 Blazer chassis- MC swap

[Xena]

I desire to power up my brakes: I have a 60 GMC sitting on a 74 Blazer, with the usual Blazer front discs/rear drums with a dual chamber unknown make master cylinder (I assume its not a 60-66). I want to find a power assist setup and am wonderfing if I could use something small and cheap ie an S-10 MC or would need to go bigger ie giant brake booster that came stock on the 70s 4x4 trucks. I like the simple and clean look of the little one....but will it have enough to stop my custom 4x4 with 35'' tires?? What's your two bits?