1965 A-body, which booster fits
Thread Starter
Staging Lane
Joined: Sep 2009
Posts: 75
Likes: 0
1965 A-body, which booster fits I'm going to be putting an LS in a 65 buick special, currently with single circuit drums. I want to do the brakes first, because once the engine is in, i wont want to keep the car off the road. 
1. Will an 11" booster work in a 65 with an ls1?
2. will a hydroboost booster work in a 65? If so, does it have to be flipped upside down?
1. Will an 11" booster work in a 65 with an ls1?
2. will a hydroboost booster work in a 65? If so, does it have to be flipped upside down?
TECH Resident
Joined: Feb 2014
Posts: 954
Likes: 9
From: Encinitas CA
I can't answer the fitment issue, but love the hydroboost booster unit I installed on my 1951 Ford pickup. I found a brand new Delco unit from a 2010 silverado for cheap on Amazon (search this site and you'll find my post with part #)
I added that with an upsized GM truck master cylinder larger bore (1 1/4"). This reduced the required pedal travel and gives a very solid pedal. My old truck has 11" discs and metric calipers upfront and the large truck drums on the Ford 9". Braking system feels like a new vehicle.
I think with your setup, you could use OEM Delco hoses to the booster, too, which are very reasonably priced.
With my vacuum boosted setup, the braking (feel) sucked. Could barely lock them up with high foot pressure and lots of pedal travel.
Some old NASA ergonomics studies show brake modulation (with a human leg) is easier with very low travel and firm (high) pressure rates. Intuition might suggest differently. I know my real world experience aligns with the NASA studies, having driven many different vehicles with different braking systems.
Doug
I added that with an upsized GM truck master cylinder larger bore (1 1/4"). This reduced the required pedal travel and gives a very solid pedal. My old truck has 11" discs and metric calipers upfront and the large truck drums on the Ford 9". Braking system feels like a new vehicle.
I think with your setup, you could use OEM Delco hoses to the booster, too, which are very reasonably priced.
With my vacuum boosted setup, the braking (feel) sucked. Could barely lock them up with high foot pressure and lots of pedal travel.
Some old NASA ergonomics studies show brake modulation (with a human leg) is easier with very low travel and firm (high) pressure rates. Intuition might suggest differently. I know my real world experience aligns with the NASA studies, having driven many different vehicles with different braking systems.
Doug
Teching In
Joined: May 2012
Posts: 10
Likes: 0
From: Mount Pleasant, SC
I will check mine tomorrow. I have a pair of 65 Lemans. I installed a stainless steel brake conversion kit with the 67- 69 booster 7-8 years ago. Worked great. I finished my 5.3 conversion a few months ago and the brakes work just as good with the stock 5.3. If you search 65 lemans 4 door you should find my initial write up with pictures. I haven't updated it in a while.
PM me if you need more info or pictures.
Jim
PM me if you need more info or pictures.
Jim
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