Looking for Some Advice

I plan on getting a more heavy duty rear end, but want to keep the 5x4 bolt pattern that it currently has. Is this possible? And what would be the easiest way to go about doing this? Any help is appreciated.

only one way to go then.. an original A-body 8 3/4. not gonna be cheap though.. they are bringing stupid money in most cases anymore.. talking $600 (if you are lucky)- $1000.

i like your choice of the eddy efi.. like that port injection over the cheaper units design.. let us know how ya make out with it...