engine swap

(posted this question earlier in the wrong forum)
I purchased a '78 Firebird that someone dropped a Buick engine in(that does not run). How much trouble is it to drop a 350 Chevy engine & tranny in it? And would it even be worth the trouble. Thanks for any suggestions.

It should be a bolt in swap if they didn't mess it up when they put in the Buick. If it's worth the trouble depends on the condition of the car.