Looks like you got a good deal, hope everything is up to snuff, you never know with used engines, If it was mine I'd pull the heads and oil pan and take a peak to make sure everything at least looks alright. Also I'd definetly install a new front seal and a new rear main seal. It might save some headaches later on. Lot easier to do this kinda stuff now than after you have the motor in the car.
Goodluck, Charles