worship79

I wonder where to get a pump with two return lines?

'75

All the GM's that came with a hydroboost had the pump with 2 returns. Mine is from a 92 GMC 3500.

worship79

Should've thought of that myself. I think I'll get one from RockAuto then. Care to send me a picture of your pump for reference? I'm afraid GMC trucks are not so common here.

'75

worship79

Thanks for the photo! Can't quite read the first two digits of the lower code, but I can look up the 92 GMC 2500 diesel at RockAuto.

The top return is the one from the hydroboost en the bottom from the PS?

'75

Yes, top return I used for HB and bottom is from the steering box. I was mistaken, it's from a 92 3500 gmc.

http://www.rockauto.com/en/moreinfo....147700&jsn=508

worship79

Great, thanks!!

71bbc

Hi everybody, I have questions regarding this conversion to ask, please help.
My car is a 71 manual brake. On the firewall, I have 2 studs holding master cylinder and lower, another two bolts to go in two nuts welded on the pedal assembly bracket from inside. Now, I wanna know if you guys used existing lower nuts (or upper studs) installing the hydro unit plate?If lower holes used, then looks like I have to extend the hole more down and hydroboost pedal linkage will be in angle (compare to original rod for mc) Is this OK? Please input.

worship79

Contact Matthew Rogers ( Tamaca1 @ aol .com); he has instructions for manual conversions.

Cool bean

Hi Mooser, this is a great write up! But the pictures are not displaying. Is there any chance you still have the pics? I know i can figure it out given the detail you typed, but the pics would surr help. ;-)

Lobzila

I hate photobucket! Not as much as the guys here do, but for the same reason. Mooser, do you have pictures of your hose routing down to the pump? Thanks.
Also for you guys on a budget, I got a Hydroboost at a local bone yard for 17.00, made my own mounting plate, hoses were the most coming it at 79.00. Conversion is mostly done for less than 100.00. Now to see if it works.
Thanks again for your great write up Mooser, it really helped out.

radiotexas

Thanks a lot Johnny Shaftoe! See the big red mark on my forehead, rapidly turning black, green and blue? It's a bruise from slamming my forehead with my hand after watching your braided hose cutting video. Why didn't I think of that, or why couldn't I think of that?
It works like a champ. Thanks!

worship79

Could it be you are not using the adjustment bracket? Because the dual return pump sure doesn't fit with it and it's not in your photo too

https://keenparts.com/pages/Catalog3...=44015&year=C3

'75

I'm using a GM serpentine belt set up.

worship79

Ah, wish I was too. Maybe oneday in the future: untill that day I'll try to make it work