stock height of a rear c10 coil please help

[dragn91]

i need to know the stock height of a rear coil spring for a 60-72 c10 mines a 66 if that matters. i purchased a set of rear chevelle coils because i heard they would drop the rear but they look much taller. it could be the weight of the truck so i need to know how tall they are out of the truck. the coils are only temp. im trying to drive the truck to a show tomorrow but i dont want it sitting stock. also if anyone has any piks of rear drop blocks they have made id appreciate it also.