Previous indexer listed Roger Cruz as penciller but Antonio Pontes Junior confirmed with him that he did just the interiors (via X/Twitter).
Source for colors credit is OIMU, citing the TPB collection “Uncanny X-Men: the New Age – First Foursaken.” GCD previously listed colors credit as “Antonio Fabela ?”.
No letters, preview of artwork from Uncanny X-Men (Marvel, 1981 series) #475.