I have a 98 4X4 Blazer. Daily driver no offroading. Ball joint is squeaking/creaking and DR tire is wearing on the outer. Was going to go with Moog Ball joints but there are 2 different upper & lower part #s. I need help knowing if there is a difference beside the price.

Set1:
Upper: K5208 $24 (bolt in)
Lower: K6145T $25 (looks like a press-in type)

Set 2:
Upper: K5320 $42 (bolt in)
Lower: K5335 $39 (bolt in)

I'm not sure if there is a difference between 2wd & 4wd Ball Joints.

Also, I was looking at the AC Delco OEM parts. Is there a difference between the ACDelco & ACDelco Advantage parts?

Example:
ACDelco Upper: 45D0057 $39
ACDelco Advantage Upper: 46D0057A $17

 

k,is go with 2nd set. on 4wd both is bolt in. 2wd lower is press in.

as for the advantage etc. the advantage is the "low end" version. Go with the regular ones.