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Hello,
I have a pair of D61/D70 axles from a 1990 Dodge W350 diesel that is going into my '63 Jeep J300 pick-up, along with a 4BT. The W350 has vacuum power brakes. Should I retain these (getting the proper P/S pump for my 4BT) or should I go with hydroboost altogether?
Thanks,
Mikel
 

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Seriously?

I don't think there is any vacuum comparison to Hydroboost. It's the shizzle, yo.
 

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you mean vacuum pump? they are pricy, but that's the route i went. I just won a vacuum pump/PS pump on ebay for 265... I have seen them go 300+

This is the route i went, but i also have a lighter vehicle, 5k or so loaded.
 

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1989 Jeep Wagoneer, 360v8, 727, stock for now,
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The 4B's come with a PS pump designed for hydro-boost.
I did it on my Scout conversion, I won't go back to vacuum.
 

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I started with vacuum assist and went to hydroboost because I was worried about relying on a Ford vacuum (diaphram) style pump for something as important as brakes. My hydroboost handles the extra engine weight and my boat towing great. Yes, your 4BT PS pump should have three ports on it so you can do hydroboost easily. My hydroboost unit was a rebuilt for about $70-$80. The slave unit at the clutch and the new hydraulic hoses are easy to get and I don't think I spent more that $250 for the whole job. The Hydroboost is more work and about the same cost as a Cummins vacuum pump but I think the extra effort was worth it.
 
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