I know that the supercharger fans wil not like this one, i don't either, but do to financial concerns would a non supercharged 3.8 out of the same year of Bonneville be able to be swapped and how difficult would the change be. thanks for your time.

Yes it can, but the PCM will need to be tuned for that. Or swap out PCMs. Not sure about the wiring harness.

I am sorry to be redundant, but I was informed that the park avenue sc enjine from a 1998 could be used if the oil pan and harmonic balancer were change, i was just wondering if this were true.. I need to know as many options as i can, i am on a limited budjet, thanks again for anyones time and know how, I appreciate it greatly.

The 3800 series2 is all the same block. mounts, may be different, some mounts are on the oil pan. There'* no reason to change the harmonic balancer unless your changing it from a NA engine to a supercharged. Parts can be removed from our engine and moved over to the new engine. such as oil pan, mounts, ICM bracket, what ever.