dyno #s seem low ?

Took my 71 340 duster to get dyno tuned, end result 271 HP & 277 tq on a dyno jet. This seems pretty low to me, I was looking for a little over 300. Mods are ld340 intake, voodoo cam, 650 quick fuel carb, headers, 2.5" exhaust, fbo ignition, stock J heads. Do these numbers seem right?? Motor was just rebuilt to factory specs 2k miles ago.

forget the dyno, I think you have a nice street combo going. run it
my lowly lol, 383 powered barracuda has smoked many 500- 600 hp, that's dyno hp cars lol
I see alot of cars on this forum I put in that catagory based on times posted.lol