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I know that the Np435 has some clearence issues with the tranny hump on the tub. Would a 1 inch body lift solve this or a 2 inch Body lift? Thanks Np435 experts.
The body lift doesn't hurt that's for sure. There is a fair amount of cutting needed without it and it certainly makes bending the shifter a bit easier.
This being said, body lift or not, I'd highly recommend a top access panel through the floor. You will need to pop the top off your tranny one day and its sure easier to do in the truck...
The more body lift the smaller the hole around the shifter. I had a 3 inch body lift in mine when I istalled the Np435 and covered the shifter with a hurst shifter boot.
X2 on the access cover. Bigger the better. I think the large cover looks better than a small patch.
When I installed the 435 I cut the heads off some longer mounting bolts and then hack sawed a slot into the top so I could screw them out and used them for alignment pins to help slide the trans into place.For the tunnel I cut the top off plus down the driver side(it makes bolting on the transfer case shifter alot easier).If I remember right I notched the crossmember so I could have access to the bottom transfer case bolts.To check, bolt everything together on the floor to see if it would make it easier to notch.If you ever have to take it out you will like it because some time the exhuast is in the way to take out the crossmember.