I have only skimmed over this I thought this was a fairly simple up grade apparently not the first thing I noticed is the steering shaft angle,among a myriad other things.
Sadly this seems to be par for the course with American aftermarket parts.
I remember only as far back as the mid 80s that the American made parts I was buying then were always good quality and well engineered.
Something has gone very wrong since. It's not as if there are no good American engineers any more. Maybe they just don't offer enough salary for them in the auto parts industry?