No - complete drive will not work, but the lower half could possibly be a match. If the drive you bought is from late 1980 or the early 1981, then the lower half and shift cable will be identical in every way to a 1979 V8 lower.
The upper gearbox will have a different gear ratio in it and will not work behind a V8.
If the purchased drive is any newer than 1981, then it will be a different beast. If the new one has a zinc anode behind the 6 idle relief holes above the prop, you'll have some conversion issues to even use the lower. The lower can work for you, but you'll need some more parts to make it shift properly.