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Old 06-03-2015, 11:26 PM   #13
cal30_sniper
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Join Date: Jan 2011
Location: Coastal NC
Posts: 276
Re: Completed auto to NV4500 swap - 86 C20 Suburban

Yes, it was an auto, 4WD truck tunnel, sorry for the confusion. You will need a higher tunnel, no way around it. You don't need a body lift, and I wouldn't recommend one. Too much extra work to make it come out right, and your whole truck becomes less aerodynamic and less stable with no extra ground clearance. Just get a 4WD tunnel, it gives plenty of clearance all the way around.

The truck is still going strong 17k miles later. I've had it over the hill and up the dale. I towed a 13k lb load from Florida to South Texas, and have hauled my two Firebirds all over creation on a dual axle car trailer. First gear has worked out great with the locker in the rear for offroading out in the desert. Haven't found a place yet that I wasn't able to get in and out of.

I retained the auto steering column. I couldn't find a tilt manual column in good shape. I removed the shifter, the linkage, and the indicator in the instrument cluster. I used the instrument cluster to mount lights for the Emergency Brake and High Beams.
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86 Chevrolet K20/30 Suburban - 8.1/NV4500/NP205/Dana 60/14 bolt FF, build in progress
73 Formula - 400/Doug Nash 4+1, resto on hold
86 Chevrolet K30 3+3 - 350/TH400/NP241, Air Force/Forest Service Rescue Truck, for sale
01 Ram 2500 - 5.9L Magnum, daily driver
91 BMW 325i - Chumpcar series racecar
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