How much horsepower does my 347 stroker has?

I have a 347 that was fully rebuilt with forged flat top pistons, svo heads(not ported),crane 1.7 roller rockers,f 303 cam,edelbrock up and lower intake mainfold, 30lb injectors matching maf ,msd 9mm wires,msd 9a box, bbk shorties,bbk x-pipe, super 44's mufflers,march performance pulleys,electric fan.the engine runs great,idle is nice and lumpy,car pulls real hard,and 373 posi gears in a 91 mustang. just wanted some opinions on my estimated horsepower as there is no dyno's near my home and haven't found anybody that wants to try me,tks