Lariat Crest was rebuilt to Plan 3973D from Gull Lake August 8, 1940. It was painted into CB&Q Streamline colors and given four tread folding steps at that time. It was repainted to Pullman paint diagram CED4217C Shadowline at an undetermined date. In Late July and early August 1940, six heavyweight Pullman sleepers were rebuilt and semi-streamlined for the joint Colorado and Southern / Fort Worth and Denver Texas Zephyr service. The 10 Section -1 Compartment -1 Drawing Room Lariat Crest and Lariat Range; 8 Section - 5 Double Bedroom Castle Crest and Castle Range; and 12 Section - 1 Drawing Room Spanish Crest and Spanish Range.