Link for cam went to a "Girly" cam(hydro). It won't get the job done.
It is going to take a solid flat tappet or solid roller to turn the rpm needed to run mid 6's in the 1/8th with only 347 cubes as you're going to need the potential for 7500 rpm shifts.
Solid flat tappet is the only way to fly if you can't budget a roller cam set-up.
How much are you willing to lighten the car??, that will make the most difference and allow you to not have to go so radical with the engine. 6.50's in the 1/8th = 10.20 in the 1/4, it isn't going to be stupid easy to go that quick with only 347 cubes. Don't happen to have a 351W around to stroke, do you?? It would make it easier with the car at stock weight.