What rear end should i use in my 1970 chevy c10 swb?

[1970chevc101994]

I am 18 years old, currently on my second restoration. I bought this 1970 chevy c10 with a 454 in it. I am send the motor out to get built, looking at 650-800hp. It will be just a pro street truck. No drag racing will be done with it but I would like to know if anyone has any suggestions on complete rear end asemblys to use. Or possibly just getting this rear end built. It is a 12 bolt truck axle not sure what size ring gear yet. Haven't got that far. Thanks. And I am new to this whole forum thing so I apologize if I did something wrong