jegs-which year 360 crate is best?

Just my opinion, but I'd buy this LA version that has a roller cam. You'd have to buy a 360 car oil pan, but everything else from your 318 should switch over.

ATK Engines DD65: Remanufactured Crate Engine for 1991 Dodge Truck/Van with 360ci/5.9L V8 - JEGS