Power brake conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C15_Sierra · 10-03-2011, 07:53 AM

I want to convert my '80 with manual brakes over to vacuum power brakes. Do I need to swap a vacuum power brake pedal as well, or can I get away with my manual brake pedal for the time being?

I've also been looking at auto trans brake pedals - truck was originally a 3 on the tree - because when the truck was converted to a TH350 some time ago, the PO just took off the clutch pedal, so it looks kind of awkward with the small brake pedal. I'm wondering, is there's a difference in hydroboost vs. vacuum pedal ratios?

Thanks!

10-03-2011, 07:53 AM	#1
C15_Sierra Registered User Join Date: Apr 2011 Location: Hartford CT Posts: 223	Power brake conversion I want to convert my '80 with manual brakes over to vacuum power brakes. Do I need to swap a vacuum power brake pedal as well, or can I get away with my manual brake pedal for the time being? I've also been looking at auto trans brake pedals - truck was originally a 3 on the tree - because when the truck was converted to a TH350 some time ago, the PO just took off the clutch pedal, so it looks kind of awkward with the small brake pedal. I'm wondering, is there's a difference in hydroboost vs. vacuum pedal ratios? Thanks! __________________ -Steve 1980 GMC C15 Sierra LWB Dark Carmine Red/Carmine Int Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011) Now: 5.3/4L60E, 2.73 12-bolt open rear

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