4 link geometry review (calcs done)

[JB5812]

Hey guys, new here and building an F100 for a while now that will be an all-purpose street truck that I'd like capable of street, track, or whatever-- making a versatile build that is a good middle-ground for whatever I may do. I'm building a custom triangulated 4 link and have had to make a few compromises due to the narrow (32" center > center) frame. The big one is in keeping a minimum 30* angle from truck centerline, I'm looking at roughly 12-13" long upper links. I know this is short and I'm trying to determine if this is TOO short, or with the right setup it will be alright. To really explore this, I've input my proposed setup and a few changes into a 4 link calc. The changes I've made, such as lower link length, have been based on keeping the shown pinion angle change to a minimum. The rest of the shown info I'm not 100% sure on which is why I'm bringing this more technical info here for some help! So any feedback and what I should be adjusting to see is much appreciated.

The first scenario is both links parallel from section view with link lengths adjusted until the pinion angle change is minimized as much as possible. To determine this, I've set the travel to 1.5", which with coilovers all around and a pretty good spring rate, I don't expect to see much travel. Here are the results:

For reference, X axis is the frame (0 is axle), Y is the axle (0 is the truck centerline), and Z is height from ground.

Scenario 1, links parallel (section, side view), lengths set to keep pinion change 0. The does result in shorter lower links though. Not sure if that's an issue

Scenario 1, 1.5" travel

Scenario 2, top link angled down from axle to frame, bottom angled slightly up from axle to frame, no travel

Scenario 2, 1.5" travel. Pinion change is present, and without shortening the lowers significantly, it sits as shown.

These were just a starting point. The uppers are unfortunately pretty set because of the narrow frame and having to keep the 30*, but I can definitely change up the slope on them. The front upper link bracket I have have 3 holes on them. As it sits, the top one would be used at parallel. Again, any help is appreciated and there are other tabs on this calc that show other data. If anyone feels like seeing something or has some suggestions, I would love to input them and see what happens. Thanks in advance!