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cummins quigley van

15346 Views 27 Replies 11 Participants Last post by  Wanderer
Hi all,I have installed a cummins 3.9 cpl 858 105 hp motor in my 89 quigley ford van.It was a tight fit but once installed it looks better than the old straight 6 did.I am going to try to attach a few pictures,will see if it works,they might be to big.The motor I picked up had a ford adapter and a 435 trans so I just pulled it and put in a zf 5 speed.I have only driven it a few miles to gas it up so it will need some tweaking I am sure.Thanks for all the info ,I used the search button and never needed to ask a question !!!


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The Ford HP 44 housings are pretty stout. Their weakness under a heavy rig is balljoints. If you're not running big tires or beating it offroad you'd probably be fine with the 6BT and a 44 front. Even under normal use, balljoints wear faster with more weight. You may end up replacing balljoints every 50K miles.

I had a '92 balljoint 60 front under my '70 for awhile and DS balljoints would need replaced every 30K or so with 35" tires. I had a real heavy front winch bumper. The kingpin 60 fronts last forever if you grease them and keep out of water.
Ford 3/4 ton disc axles are all 69" WMS-WMS. Ford drum brake axles are 67.5" wms-wms . I don't recall there being a difference between the 1/2 ton and 3/4 ton disc axle widths.

The disc axles are wider because the open knuckles left 3/4" less room for the shock mounts on each side. The shocks wouldn't fit so Ford made the whole axle wider.

The 78-79 1/2 ton 44 front is the cheezball housing to stay away from with the integral wedges you mention. The earlier ones are all 3" 1/2" wall tubes.

The 78-79 3/4 ton HP 44 looks beefier than the previous 76-77.5 low pinion 44 front, but it's not. The tubes and housing are thinner.
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