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Pigeon-Rat - Opel gambler build

1966 Opel rekord mounted to 1990 Nissan pathfinder.
Midnight4x4 is a local shop here in Salt Lake. They sell a lot of fab parts, and build custom cages. Great guys to hang with too.
That’s SLC secret 4x4 fab parts place.
I’m always buying little bits and pieces from them.
 
I bolted a tire back on just to see where things ended up. First, I need to put a bend in the radius arms. I forgot about steering. Doh! Gotta make some room for the tire to swing in.
Second, at full bump (as it is right now), the tire is still a couple inches from the top of the wheel well opening. I've got to be able to do better than that.
I probably need to go with a radius arm style closer to @r3dd0g so that I can aim it at the bottom of the axle, then tie into the top. That way the radius arm isn't limiting my up travel so much.
Also have to rethink some of my crossmember.
Nothing is ever easy.
 
I made some progress on getting pieces for inside the frame rails. I finally decided it was time to actually learn a bit about using fusion 360. Specifically, I figured out how to import an image as a canvas, then calibrate it to the right size.
First I made a template then took a pic to use for the canvas:
20260608_231056 (1).jpg

I figured out that having a ruler in the pic made calibration WAY easier.

Once that was done, I just used the line tool to trace it out:
Screenshot 2026-06-09 202407.png

Add in a couple of fillets and 3 point arcs and it looks pretty good!

I've got a friend that has a 4x8 plazma table, so now that I actually can make something he can use, he cut the pieces out for me. His shop is 15 min away from me, and it took all of 5 minutes to cut both pieces.
20260609_193439.jpg

I can't believe I put off learning this for this long. :doah:

I'll get these bolted up and then continue my crossmember modifications. Looking at it today, I'm fairly certain that I won't even end up using the outside piece on the drivers side. I'm going camping this weekend, so may not be much progress for a few days, but getting these things cut so cleanly feels pretty good.
 
20260614_163357.jpg

Got my hands on an 1989 landcruiser steering box. (on the left)
It looks very similar to the Nissan one, but just a touch smaller, so fitment isn't going to be an issue. It accepts the same steering shaft, so that's nice, but the pitman arm doesn't transfer over. Not a big deal, but would have been nice.

I did confirm that it rotates the correct way for the pitman arm to be pointed forward. :waytogo:

I'm going to try and nail down the changes I need to make to the crossmember this week, then I can move on to steering!
 
20260619_184310.jpg

I've nailed down the changes to the crossmember. I'm still not as far up as I'd like, but if you look close you can see the alternator is just above the crossmember now. I can't really get any higher without moving it, and there are no high mount kits available.
I'm not willing to design that myself at this point, so this is where it stays.
 
View attachment 529190

I've nailed down the changes to the crossmember. I'm still not as far up as I'd like, but if you look close you can see the alternator is just above the crossmember now. I can't really get any higher without moving it, and there are no high mount kits available.
I'm not willing to design that myself at this point, so this is where it stays.
Send it!
 
I think I've had another change of heart when it comes to the crossmember and my lack of up travel. As you can see from my previous post, there is only so much room to snake the crossmember in between the alternator and the DS axle... but what if I didn't at all?!?

While watching videos on setting up swingset steering, I realized that the 2wd TTB guys do not run a crossmember between the pivots mounted under each frame rail. That got me thinking.

20260622_231028.jpg
As you can see in this pic, the DS axle mounts almost directly under the PS frame rail. That means pretty much all of the load is straight into the frame. Unfortunately, because this is a 4x4 axle, the PS axle mounts pretty much in the middle, so I definately need to have that supported by both frame rails, but maybe not the DS axle.

What if I did something like this:
20260516_221650.jpg

It seems like that might actually be better. It would give both mounts some front to back support, and the front mount should have plenty of vertical support being directly under the axle.

Does that make sense to anyone else? If I lost that section of crossmember it gives me several inches of up travel potentially.

Anyway, I'll noodle on that for a few more days. If anyone has any thoughts, please share.

In the mean time, I picked up a bunch of heim joints and bushings from midnight4x4 so I can get to mocking up the steering. After watching some videos by Dune Hippy, I think I'm going to build it something like this:
swingset mockup.png
 
I always get worried that I didn’t provide/ or, add enough support structure, when I do stuff like this. But, I always end up “over-building” everything, to the detriment of travel.
When I originally designed my full hydraulic steering, I was deathly afraid of not having enough structure to secure the double ended steering ram.
Then after looking at the Artec truss, I realized I was wrong. 1/4 inch steel is plenty strong.
Anyway, what I wanted to say to you is/was,
“Trust the process” of metal(steel) being strong enough.
I’ll bet the way you described not having that piece of crossmember in there, will more than likely work.
Just my $0.02…
 
Could you add some tube for support over to the other frame rail if needed? Like with a bend and forward of the diff as long as it didn't interfere with the steering.
 
Could you add some tube for support over to the other frame rail if needed? Like with a bend and forward of the diff as long as it didn't interfere with the steering.
I think that is the problem, it would interfere with steering.

View attachment 529636

One I found that hollander motorsports builds, looks similar to what you're thinking, I think. So long as the drivers mount is supported so it can't deflect backwards I think you will be fine.
Thanks for that pic! That is pretty much what I was thinking! That helps a lot.
 

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