The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Dual Master Cylinder

**jocko** · 07-31-2021, 11:24 PM

Recommend go to local parts store (so you can confirm visually before paying) - ask for a 67-70 C20 Power Brake mc. You still may not get what you want, some of the minor deltas in power vs manual mc part numbers seem to have somewhat faded over the years and some folks have problems finding what they need. But the key is to search in the window after the dual pot was mandated and before disks came out - and specifically for a 3/4 ton WITH power brakes from the factory. Let us know what you find and good luck!

07-31-2021, 11:24 PM	#4
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,934	Re: Dual Master Cylinder - bore depth Recommend go to local parts store (so you can confirm visually before paying) - ask for a 67-70 C20 Power Brake mc. You still may not get what you want, some of the minor deltas in power vs manual mc part numbers seem to have somewhat faded over the years and some folks have problems finding what they need. But the key is to search in the window after the dual pot was mandated and before disks came out - and specifically for a 3/4 ton WITH power brakes from the factory. Let us know what you find and good luck!