Need answers; hydroboost swap and Eaton disc conv.

[dewdew]

Thanks Yukon. Is it theoretically possible to use virtually any hydroboost? Obviously I would use one meant for a truck, but couldn't I get one from a newer Chev, that way I could utilize a newer aluminum master cylinder? It seams I will need to do some fabrication either way and lines will probably need to be made. Also, looking into my gearbox situation, I found that the 73 and up gearboxes have a smaller input shaft size (3/4" instead of 13/16".) Is this what people are using and just changing the last section of the steering column to match, or is there something I am missing?

[Yukon Jack]

Originally Posted by dewdew

Thanks Yukon. Is it theoretically possible to use virtually any hydroboost? Obviously I would use one meant for a truck, but couldn't I get one from a newer Chev, that way I could utilize a newer aluminum master cylinder? It seams I will need to do some fabrication either way and lines will probably need to be made.

I can't think of any reason you couldn't use a new Chevy's hydroboost system. What made my swap easy was I was using the donor truck's motor and all of the accessories so I did not have to do any modifications to my stock power steering pump. Only think I had to do was swap the old high press steering box flare end onto the hydroboost's high pressure end since the old style is a flare end and the new style had an o-ring end.

[dewdew]

So, I decided to attempt to put a newer style master cylinder for two reasons. First, the setup would cost twice as much, while still netting me the same results. Second, I am starting to think the a aluminum/plastic master cylinder would look out of place on my '71 (unless I was to do a fuel injected motor and a rack and pinion.) I have decided I will probably go with a hydroboost/master cylinder setup off of '92-'93 C/K30 since they had rear disc brakes, and coming off of a one ton I know it will have the stopping ability. I really just need to know what kind of power steering pump I should use and get reassurance that a '73-'87 gearbox will work (and have a quicker ratio.) Any input?

[wibilly]

i would check on the 80s diesel trucks blazers or burbs they used the hydra boosts not sure if those pumps will work with our brackets or not.i also noticed on the 76 eldorodo i got my rear caliper cores from had a hydra boose as well. i just used mt 3/4 ton vacume booster and master with no isues