Re: engine swap
This is mostly a 1st and 2nd Gen site. You might want to try Pro-Touring.com. Putting a BBC will be a major exercise, because the engine sits so far back on a '94. You are asking for a lot of pain and suffering for a car that won't be street legal in most states. Now, if you are setting up a drag car then that's a different story.
If you are looking for big power, rebuild the LT-1, stroke it to 383 and put some kind of forced induction on it. It might not be cheaper, but you shouldn't have to do any major fabrication and you will be able to run the car on the street.