Th400 help

[reaperz1]

So long story,short version lol, I have been restoring a 1972 c10 with the stock 402 and th400 for the past 8 years. Due to my divorce and having to move I am missing the bolts to transmission mount connecting it to crossmember and can’t seem to find any, so does anyone know the size of bolts and grade I should get, also is there supposed to be a plate between cross member and transmission mount if everything has stock brackets and mounts if so do you know where I can get one there was not one on this truck that I know of.
Thank you for your time