ashtray question

[c-mack]

ok, the other day, i went to longview to a relitives house, and there was a beat up old gmc 4x4 truck there that hadnt been ran for...god only knows , and anyway, it had a few interior parts that i needed for my 67 chevy. like stock rear view mirror, visors and ashtray, well with a lil minor work, i got all the parts to go onto my truck except for the ashtray . are they different from the gmc's to the chevy's? the ashtray will go in there with a lot of pushing and when u try to open it, the whole thing comes out. i dont understand how to make it go in there right. can somebody help me out? thanks.