LP...Bluesbreakers and most of Fresh Cream was recorded with borrowed guitars, most of it was a 50's Les Paul Custom, 3 pickup with a bigsby buit after than the SG, the red 335 and a Firebird I were his main axes.
Since Eric's 335 was a middle 60's it would have had alnico 5 pickups for sure...alnico II Pros will get you close but a pair of 59B's would be closer to what Eric really had