Consider purchasing new lower control arms, which should come with new ball joints and new inner bushings installed. Although the cost is high, they will save you a LOT of labor and avoid the need for special tools (but you'll still need the spring compressor). Suspension work is hard work.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC