motor mount bolt size?

Well i bought a 91 gt about a month or some ago. and have been tearing it all apart, one of those cars where you get deaper you find more and more problems with it ! Anyways he didnt have anymotor mount bolts in the brackets... so what sive are they,,, oh and along with the tranny mount bolts for bolting the tranny to the mount.. what size is that.! thanks!