The AMT/Ertl/Esci Kenworth Aerodyne are all the same kit. They are based on the Tyrone malone Papa & Hideout trucks, so they have long frames & the Kenworth 8-bag air ride suspension.
So far, so good. What's your "ultimate" plan with this? Reason I ask is if you're thinking fleet truck, stick with the Series 60. If you're thinking Owner-Operator either engine will be fine.
Looks like it went together well, and I like the Dupli-Color Bumper Chrome instead of the plated parts. Gives it that fleet look with brushed aluminum tanks.