Hi, I'm starting to play some of Metallica's earlier stuff (which is harder than the later stuff) and I'm wondering how to get that incredibly clean sound on And Justice For All
(like in the verses in One and the riff in And Justice For All)

Thx in advance
Roland JC-120. At least i think that might have been what they used. It is hard to find a clean sound that duplicates the JC-120 tone.

Epi LP Custom EMGs
ESP H-1000
Schecter Elite 7
Jackson Dominion
Peavey Valveking Head
Jet City JCA24s
Blackstar HT20 & HTV212
MXR Pedals
Schecter Stiletto Custom
Schecter Stiletto Studio
Fender Vintage Modified
Ampeg B2RE
Fender 4x10 Cab