OK, You know about death wobble but do you know what causes it? Being a knuckle axle the trunion pins are how the tire pivots to turn. Your particular issue was caused by the SPOA perches being welded on at the wrong angle. On flat level ground place an angle finder on the flat part on the bottom of the front third member. You need to see 12 degrees. If you description is correct I suspect you have less than 12. There is a sweet spot on the bottom of the front tires where they pivot. To far one way or the other the tire slaps back and forth. You can cure this problem best by cutting and rotating the balls on the ends of the axle. It is not that tough to do but is the best of all worlds. You get to really lift the pinion flange up and have excellent driving manners.
Your comment that you fixed your death wobble with a stabilizer isn't the whole story, you have masked the real issue of wrong pinion angle. There is a slight (very slight) up angle on the front pinion flange not much but not flat or down as you described.
MY