What happened to the reply that I made a few days ago?
The El Camino driveshaft is exactly 9 inches longer than the sedan driveshaft. To install a TH700 or T5 in an El Camino, the driveshaft must be 3 inches shorter, or 6 inches longer than a stock sedan driveshaft.
The stock sedan driveshaft is 52.42 inches long. The stock El Camino driveshaft is 61.42 inches long.