6.0 vs 6.2 LS: what's the difference?

Both share the 3.622 in stroke; the 6.2 has a larger 4.065 in bore vs. 4.000 in on the 6.0.

• 6.0 L (364 ci): mostly iron-block truck engines (LQ4, LQ9, LY6, L96) plus aluminum car/SUV versions (LS2, L76, L77, L98). Most use cathedral-port heads; the LY6/L96 use rectangle-port heads.
• 6.2 L (376 ci): all aluminum Gen IV (L92, L9H, L94, LS3, L99, LSA, LS9) with rectangle-port heads. More power NA (e.g., LS3 425–436 hp) but more expensive to buy.

Rule of thumb: a junkyard iron 6.0 is the budget torque/boost choice; a 6.2 is the naturally aspirated power choice. Check AFM (L94, L99) and 58x/drive-by-wire electronics on Gen IV engines when planning the ECU.