are my wheel studs to short

Thanks guys the thing is I bought the rims on line over the phone this is starting to be a pain lol.You think a good tire shop will be able to advise me the right lug if there wrong.my rims do have a taper in them and the acron lugs do seam to fit in the hole fine,also most of my studs in the hub are loose and do wobble around.I had thease rims on my roadrunner and all was fine and on my 69 dart 7 years no problim and my 66 beaumont with no problims with acron lugs,however thease rime were made in China.My studs are 7/16 org.