The J/37 and J/37c are both performance cruising design. The J/37c followed the J/37 in production. The engine is mounted mid-ships under the salon table in the J/37s and aft in the J/37c. The J/37c has four ports along the cabin trunk, the J/37 three.

J/37 original brochure: Speed, Ease of Handling and Cruising Comfort.

Bob Perry Design Review: J/37, Comfortable cruiser with built-in performance.

                   J/37c                                                                   J/37

J/37c under sail

Pictures, equipment lists, and plans for J/37s:

    
Eos

Notes:

J37c specs: standing rigging, running rigging, sail, etc.
J/37 Halyard Options
J/37 Spinnaker Gear Drawing
Optimum boat speed vs. wind speed tables. 
Sheet and block load estimates.

J/37's are rod rigged. Below is a link to the rig survey performed on Jeorgia by Brion Toss Rigging. Most boat purchasers have a hull survey done on their boat as a pre-purchase condition. A rig survey goes into greater detail on the standing and running rigging than a standard hull survey will do.  Rig Survey

The large cockpit locker and Endurance's innovative way to store their outboard.