One big electric fan or two small ones to cool an LS3, and are Taurus junkyard fans any good?

One big vs two small (Speedway's fan guide):

	Single fan	Dual fans
Pros	Simpler, fewer relays, saves space, lower amp draw	More airflow, staged operation, a backup if one fails
Cons	May not cover a large core without a shroud; no backup	More space, needs a strong charging system and a relay per fan (or a dual controller), more wiring

Either way, a shroud covering the core matters as much as the fan choice. Speedway notes a big single fan may cover a square-ish core better, but its deepest point can end up closest to the engine, so check clearance.

Wiring: use a relay for each fan, triggered by a thermostatic switch or your ECU's fan output. Speedway warns that running two fans off one standard relay can blow its ~30 A fuse when both start at once; a single high-current relay works if space is tight. You can stage the second fan off the A/C compressor or a manual switch.

We don't have a source on specific junkyard fans like the Taurus, so check that fan's current draw against your fuse, relay and wire sizes.