My engine died while on a 500 mile trip (89 Shelby Daytona 2.2 five speed). While troubleshooting the engine I found that the distributor isnt rotating. I pulled the distributor and it functions as it should. I cranked the starter and looked in the hole and the keyway doesn't turn on the shaft. My timing belt and all pulleys rotate. My questions are, is there an internal chain turning the shaft that rotates the distributor and does this repair require pulling the engine.