How much should i charge to take out a engine of a bronco and put one back in?

500 min. i put a rebuilt in my s 10 chevy v6...guy charged 350 and was sorry he didnt charge more,,he put distributer in 180 degrees out and it took a week and another look buy a another mechanic to figger it.. id try for 1000 dollars and expect 2 to 4 days to get every thing perfect..