Just to elaborate for readers.4.2, 4.6 v6 or 5.4 v8 were the only engine options at that time. You won't be disappointed in any of the Ecoboosts.
4.2 was the V6
4.6 and 5.4 Were V8's
The 5.4 was a 2V were all good engines to me. The later 3 valve ones were crummy