91 cadillac brougham engine swap?
 

I have a 91 brougham in very nice condition, but it's a gutless wonder. I want to swap out the stock 5.0 liter for crate GM engine that puts out 400+ hp. I realize that I will probably have to beef up the tranny and rearend to handle the extra power. Questions I have: will an LS motor fit? Will that bolt up to my tranny? Will I have to install a tank mounted fuel pump? What issues will there be with the electronics? Any advice will be appreciated!