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JEEP CJ6 PROJECT, MOG 421 suspension travel & engine swap options.

2552 Views 5 Replies 3 Participants Last post by  Frank-cj421
Hello, this is my first post here. I'm building a jeep cj6 using unimog 421 running gear. (axles, gear/transfer box & torque tubes.)
I'm planning on using fox racing coil-over shocks, but i don't know what length of travel i need. What i'm trying to find out is what is the fully compressed and fully extended length of a standard shock for a unimog 421. As from what i've seen of unimogs in the past the standard suspension travel is enough for my needs.
Also i'm planning on using either a 300E straight 6 or 500SE V8 engine. Does anyone have knowledge of anybody doing either of these swaps. I have both of these engines available to me but i want to know which 1 would be the easier to fit to the gearbox. I've been told that the 300E engine should bolt straight to the bellhousing, but i can't check this at the moment on either engine as they are both still in the cars.
Any help would be greatly apieceated, Thanks Frank.
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My 421 owners manual doesnt have a spec, but I have 421 and floor jack ;>D I can make some measurments if you like.

OK the results...... And I was a little supprised at the results, I guess maybe the flexi frame has a lot to do with its agility. Measurments were from the center of the top moutning hole to the center of the bottom mounting hole. All measurments involved the vehicle being jacked in various places untill the tire left the ground. Rear axle Nominal = 16.5", compressed= 16" Extended= 17.25. Front Axle Nominal = 15", compressed= 14.75" Extended= 17.25. Note the rubber stop above the front axle ranged from .63" to 3"

Hope this helps. btw I have pix of the test if you are interested

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