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Ok my original post got lost in the computer wonder land so this one may not be as detailed as I had originally written.
I want to get some details straight on the El dorado HB swap
To give you my specs my rig is a 79 Cherokee chief w/401 being swapped from auto to NV4500 has 33?s and power steering. The Vacuum booster is in the way of my hydraulic master cylinder and Ive considered going to an earlier model vacuum booster mounting bracket and arm setup as it moves things further away but later in life this motor will have a larger cam coming its way and the less vacuum needed the better. I will not be running ram assist nor any other hydraulic accessories ever in the future other than these two. I do have a HD automatic tranny cooler mounted in front of my radiator that will work well for cooling the PS fluid. I want to keep the stock PS pump if I can and plan to route the lines as was detailed on several threads.
I believe mine being a 79 the existing pressure line from pump to PS Box is flare (but I haven?t had this apart yet) and from what I read I can use this Pressure line from pump to HB, (correct me if im wrong here) Then I will need to have a new line made for pressure from the HB to the PS box. For the return lines The PS box line will be in line with the T for a straight through flow and the HB line will ?T? in at a 90* ?T? fitting flowing to the PS cooler in front of the radiator and then back to the pump (with several threads suggesting a filter of some sorts)
I have read and printed out all the threads. And in most of them its gets very confusing as everyone starts suggesting the Aerostar HB ot the hummer HB or coupling a Chevy HB with 1 ton master cylinder, because usually the question is ?hydraboost ( hydroboost ) tell me what to do?. Tehn cutting and threading the rod so the eye length is correct comes into play. All great suggestions but so far every time somebody delves into the El dorado HB discussion it gets mashed in with the rest.
I would like to stick with my current Stock Master Cylinder It works really well with the stock brakes and was it not for the 5spd conversion I wouldn?t even consider changing things out, but the fact that im battling the 1" aluminium spacer and clearance from the clutch Master cylinder to the vacum booster im thinking now may be the time to clean things up, and i've got a second 77 chief to do this to so mine is the test child.
what I think I understand is the El dorado is any el dorado with HB from 74-79. And when mounting it I unbolt the aluminum spacer from my fire wall and don?t use it, (would use it if I was using a Aerostar EXT - HB unit but ive been advised not to) two of the 4 bolt studs on the El dorado HB mounting plate line up and two need to be drilled through the firewall, and you use the existing plunger indexing hole on the Cherokee fire wall but move the stud for the rod eye up 1? on the brake pedal arm. If I buy a new unit from napa or whoever what kind of plate comes attached to it does a plate come attached. Or do I need to scavenge the wrecking yards. Also when dealing with rod length 4.5? ??? I?ll get back to that thought in a minute. Gotta run but want to get this posted.
I saw BJ?s setup very clean nice setup I think I can build something similar for a lot less just want to be sure Ive got my facts straight.
Thanks in advance
Dusty
I want to get some details straight on the El dorado HB swap
To give you my specs my rig is a 79 Cherokee chief w/401 being swapped from auto to NV4500 has 33?s and power steering. The Vacuum booster is in the way of my hydraulic master cylinder and Ive considered going to an earlier model vacuum booster mounting bracket and arm setup as it moves things further away but later in life this motor will have a larger cam coming its way and the less vacuum needed the better. I will not be running ram assist nor any other hydraulic accessories ever in the future other than these two. I do have a HD automatic tranny cooler mounted in front of my radiator that will work well for cooling the PS fluid. I want to keep the stock PS pump if I can and plan to route the lines as was detailed on several threads.
I believe mine being a 79 the existing pressure line from pump to PS Box is flare (but I haven?t had this apart yet) and from what I read I can use this Pressure line from pump to HB, (correct me if im wrong here) Then I will need to have a new line made for pressure from the HB to the PS box. For the return lines The PS box line will be in line with the T for a straight through flow and the HB line will ?T? in at a 90* ?T? fitting flowing to the PS cooler in front of the radiator and then back to the pump (with several threads suggesting a filter of some sorts)
I have read and printed out all the threads. And in most of them its gets very confusing as everyone starts suggesting the Aerostar HB ot the hummer HB or coupling a Chevy HB with 1 ton master cylinder, because usually the question is ?hydraboost ( hydroboost ) tell me what to do?. Tehn cutting and threading the rod so the eye length is correct comes into play. All great suggestions but so far every time somebody delves into the El dorado HB discussion it gets mashed in with the rest.
I would like to stick with my current Stock Master Cylinder It works really well with the stock brakes and was it not for the 5spd conversion I wouldn?t even consider changing things out, but the fact that im battling the 1" aluminium spacer and clearance from the clutch Master cylinder to the vacum booster im thinking now may be the time to clean things up, and i've got a second 77 chief to do this to so mine is the test child.
what I think I understand is the El dorado is any el dorado with HB from 74-79. And when mounting it I unbolt the aluminum spacer from my fire wall and don?t use it, (would use it if I was using a Aerostar EXT - HB unit but ive been advised not to) two of the 4 bolt studs on the El dorado HB mounting plate line up and two need to be drilled through the firewall, and you use the existing plunger indexing hole on the Cherokee fire wall but move the stud for the rod eye up 1? on the brake pedal arm. If I buy a new unit from napa or whoever what kind of plate comes attached to it does a plate come attached. Or do I need to scavenge the wrecking yards. Also when dealing with rod length 4.5? ??? I?ll get back to that thought in a minute. Gotta run but want to get this posted.
I saw BJ?s setup very clean nice setup I think I can build something similar for a lot less just want to be sure Ive got my facts straight.
Thanks in advance
Dusty
Sold, to a good fsj home)
moving mine down isnt an option as my hydraulic cluth hole is already drilled and all of that is installed . 
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