Issues with performance online. Drop spindle vs ball joint and engine mounts

[Slowguy]

I ordered the drop spindle kit with the disc brake Conversion. At the same time I ordered ball joints upper and lower. I think they may have mistakenly given me ball joints that don’t work with the spindle they provided. In the full up position of the fully aired up suspension, the upper control arms make contact with the spindle. It seems like the upper ball joints are not properly sized and seat too far into the spindle. Conversely, I think the lower ball joints don’t seat far enough as I can’t insert the pin that keeps the nut from backing off. Codder pin I think it’s commonly called.

Also, I mounted the tubular engine perches today. The upper frame holes lined up fine and I chose the forward set of holes. The lower, single hole in the crossmember didn’t quite line up so I had to drill a new one - no big deal. The issue with the engine mount (I got the sliding adjustable mounts for ls) is that the single horizontal bolt I can’t seem to line up on driver side. Wondering if this is common? My next step is to loosen the bolts that mount to perches to the frame in hopes of getting the extra wiggle room necessary to get the horizontal bolts through. Finally, any suggestion where to start the slider mounts without having the cab on to check clearances? I’m guessing the most forward position?