Don't reuse the rod bolts.
Stock lift I think is .571 intake .557 exhaust (please correct me if I'm wrong),
biggest cam I ever installed in a stock 6.1 is Howards Cams 786155-14 Lift: .575 / .575, Duration @ .050: 213 / 219, Centerline: 110, not sure how much bigger you can go with stock pistons.