LS engine swap mounts in a second-gen f-body.

[7firebird1]

Hello, I have a 71 Firebird that I am dropping an LS engine into. I was wondering what the best swap mounts out there were. I have seen some that set the engine back 1"; I don't know if that is something that I should do or not. I am setting my car up for more of a Pro-touring style car. I have to buy a new subframe so I figured I would have to buy one out of a Camaro that had a small block in it. What are your opinions?