Yes I drill the knuckle out ton7/8 and out in a high steer kit they call it same thing right ?
Which kit did you use? I bought the evo drag link flip kit and drilled out to 7/8 and was experiencing exactly what you are describing. Hinrichs went through the same exact thing.
Evo recently changed their directions from drilling out 13/16 to 7/8. Me and jim were both experiencing flighty steering like your describing and both resolved our issues two different ways.
My correction involved calling synergy and buying the silver sleeve from them for 20$ shipped. Synergy has always used a 7/8s drill bit and their silver sleeve is different then evos. This solved my problem and tightened my steering right up. The only downfall to this solution was the sleeve was a little taller then evos so my nut is threaded on not as far as i would like. Nothing a little blue loctite wouldnt fix. Problem solved.
Hinrichs (Jim) actually went on amazon and ordered a new passenger side steering knuckle, ordered a 13/16 bit, redrilled his new knuckle and problem solved using the evo sleeve still.
My honest opinion is to go for Jims fix. Its the correct way to fix this problem just a little pricier.
Make sure when you drill your knuckle you drill nice and slow and careful and use drilling oil to cool down the metal. Ovaling this hole will cause you nothing but problems. My 7/8s hole with a 13/16 sleeve in it actually broke my evo sleeve in half because it was so loose. It being so loose and driving my jeep back and forth to work woukd actually cause the nut to back itself out. I would have to tighten this bolt every week so my drag link didnt fall out and me lose steering.
Just my 2 cents. Hope this helps.