With all the goodies to go with the cam ,carb,heads, etc etc that cam makes power to 6,800 rpm ,it may rev higher but the power will drop off from the cam side of things . With the valve springs set up for that package they will float at 7,200 rpm . If you had the mother of all valve springs the engine will rev higher without valve float but make no power up that high . The cam with all the right gear might make a bit more power over 6,800 rpm . 6,800 rpm is over the top for most 347 strokers unless they have an after market block ,6,200 rpm is about max for a street driven engine . My old 347 I had I took it to about 6,000 rpm and never had a problem in 10 years . Still ran 11.9 at 115 mph on the strip and was a mild low comp engine .